Lighting Cabinet, Multi-channel LED, Daylight & Blackbody Simulator, Image Evaluation, Camera Calibration, Visual Assessment

FAQ

Quick overview of core questions regarding THOUSLITE products and technologies
  • 1. Product Overview

    • What products does THOUSLITE primarily offer?

      Changzhou Thousand Lights Lighting Co., Ltd. (THOUSLITE) is a high-tech enterprise focusing on multi-channel LED lighting technology and light quality management.The company currently offers the following core products:
      • LEDCube: Any SPD Simulator
      • LEDPanel: Multi-channel LED Calibration Source
      • LEDView: Lighting Cabinet
      • LEDTrans: Transparent Uniform Lighting Box
      • LEDSSF: Camera Spectral Sensitivity Function Meter
      • LEDMax: Personalized Color Matching Curve Meter
      • LEDSimulator: Real Lighting Environment Colour Appearance Reproduction System
      • LEDBTC: Large Transmissive Uniform Illuminator
      • LEDHDR: High Dynamic Range Light Source
      • LEDSpace: High Dynamic Large-Area Uniform Light Source

    • What is THOUSLITE‘s core technology?

      THOUSLITE‘s core technology is multi-channel LED full-spectrum tunable technology and light quality management technology.Specifically:
      Spectral Power Distribution (SPD) tunable technology: Using more than a dozen carefully selected LEDs with different peak wavelengths to achieve precise adjustment of the output spectral power distribution
      Color management technology: Precisely tuning and matching any SPD with a color temperature range covering 2000K to 20000K.
      Light quality management technology: Ensuring high Color Rendering Index (CRI Ra up to 98–99) and low Metamerism Index (MI Grade A)
      Fast and accurate feedback system: Maintaining the same light quality by compensating for aging and variable environments with an external micro-spectrometer

    • What is the difference between multi-channel LED technology and traditional lighting technology?

      Traditional lighting technologies (such as fluorescent and halogen lamps) have limitations including fixed non-tunable spectra, long warm-up times, and light quality degradation over time.
      The core advantages of multi-channel LED technology:
      Spectral tunability: Spectral Power Distribution is fully tunable, whereas traditional lighting has a fixed spectrum
      Color temperature range: 2000K–20000K continuously tunable, whereas traditional lighting is fixed or has limited adjustment
      Color Rendering Index: CRI Ra up to 98–99, whereas traditional lighting is typically <90
      Metamerism Index: MI Grade A (the highest international standard), whereas traditional lighting is typically higher
      Warm-up time: No warm-up time, instantly stable, whereas traditional lighting requires warm-up
      Service life: Significantly longer than traditional fluorescent lamps

    • What is Spectral Power Distribution (SPD) tunable technology?

      Spectral Power Distribution (SPD) describes the energy distribution of a light source at different wavelengths and is the core parameter determining the color quality of a light source.
      THOUSLITE‘s SPD tunable technology is achieved through the following methods:
      • Using more than a dozen LEDs with different peak wavelengths as the light source
      • Independently controlling the intensity of each LED channel through proprietary optimization algorithms
      • Achieving precise adjustment of the output spectral power distribution
      • Reproducing any measured or imported SPD, facilitating light communication between different locations
      This means users can simulate any lighting scenario with a single device—from daylight to blackbody radiation, from laboratory standard light sources to specific commercial lighting environments.

    • What industries and applications are THOUSLITE‘s products mainly used in?

      THOUSLITE’s products are mainly used in:
      Scientific research: Color science research, lighting research, non-visual light effects research
      Industrial color evaluation: Color quality control in textile, coating, plastics, printing, and graphic arts industries
      Camera/sensor testing: Camera spectral sensitivity measurement, sensor calibration
      Display and imaging: Display panel optical evaluation, image testing
      Museums and cultural heritage: Protective lighting for cultural relic display
      Human-centric lighting: Medical lighting, human-centric lighting research

    • Do THOUSLITE‘s products comply with international standards?

      Yes. THOUSLITE’s products comply with multiple major international standards:
      ASTM D1729: Standard Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials
      ISO 3664: Viewing conditions – Graphic technology and photography
      CIE 13.3-1995: Method of Measuring and Specifying Colour Rendering Properties of Light Sources
      ISO 23603-2005 / CIE S 012/E: Standard method of assessing the spectral quality of daylight simulators
      • AATCC, DIN, BSI and other related standards

  • 2. LEDCube Any SPD Simulator

    • What is LEDCube and what are its main functions?

      LEDCube is an Any SPD Simulator launched by THOUSLITE, built on proprietary optimization algorithms and using more than a dozen carefully selected LEDs with different peak wavelengths to easily and accurately simulate any lighting environment with different Spectral Power Distribution (SPD).
      Core functions:
      SPD match: Accurately reproduce any measured or imported SPD
      High quality daylight simulation: Reproduce any phase of daylight with highest quality
      Blackbody locus simulation: Accurately produce a range of sources from 2000K to 20000K with tunable CIE Ra and Duv
      Dynamic lighting: Programmable light sequence and interval

    • What are the spectral range and color temperature range of LEDCube?

      LEDCube is available in multiple models with spectral ranges varying by model:
      • LEDCube-11 (R27): 400–700nm, 11 channels
      • LEDCube-C15 (R27): 350–700nm, 15 channels
      • LEDCube-I14 (R27): 380–730nm, 14 channels
      • LEDCube-24 (R27): 350–780nm, 18 channels
      • LEDCube-C31 (R39): 350–1000nm, >31 channels
      • LEDCube-HDR-5: 420–730nm, 5 channels
      Color temperature range: Continuously tunable from 2000K to 20000K.

    • What levels of Color Rendering Index (CRI) and Metamerism Index (MI) can LEDCube achieve?

      LEDCube can achieve:
      Color Rendering Index CIE Ra: 0–100 customizable
      Metamerism Index MI: Grade A (the highest international standard)
      This means LEDCube can simulate any light source with extremely high color reproduction accuracy, ensuring a “what you see is what you get” color evaluation experience.

    • What types of light sources can LEDCube simulate?

      LEDCube can simulate:
      Daylight at any color temperature: From 2000K to 20000K
      Light sources on the blackbody locus: With customizable CIE Ra and Duv
      Any measured or imported SPD: Reproducing spectral data obtained from actual measurements
      Custom-designed special light sources: Freely design desired light sources through single-channel control

    • What are the main application areas of LEDCube?

      The main application areas of LEDCube include:
      • Lighting research: Human-centric lighting, medical lighting, mesopic vision research
      • Object color visual assessment: Color rendering evaluation, whiteness evaluation
      • Camera and sensor testing and calibration
      • Daylight simulation
      • Non-visual light effects research
      • Agricultural lighting research
      • Large-space or customized standard lighting environments
      • Visual color evaluation and large test chart illumination

    • Does LEDCube support dynamic lighting?

      Yes. LEDCube supports programmable light sequence and interval, suitable for research and application scenarios requiring simulation of dynamic lighting environments.

    • How does LEDCube ensure long-term light quality stability?

      LEDCube ensures long-term stability through the following mechanisms:
      Fast and accurate feedback system: Maintains the same light quality by compensating for aging and variable environments with an external micro-spectrometer
      Optimized heat management: Ensures excellent long-term stability
      Service life: Significantly longer than traditional fluorescent lamps

    • Does LEDCube support wireless control and how many units can be controlled?

      Yes. LEDCube supports wireless control via Zigbee technology, allowing up to 256 LEDCubes to be controlled separately or simultaneously, making it easy to build customized lighting spaces.

    • What installation methods are available for LEDCube?

      LEDCube provides flexible installation methods for different applications:
      • Viewing cabinet installation
      • Ceiling mounting for lighting rooms
      • Customized support for large test chart 45/0 illumination

    • What models of LEDCube are available and what are the differences between them?

      LEDCube is available in multiple models, with the main differences being LED channel count, spectral range, and application scenarios:
      • LEDCube-11: 11 channels, 400–700nm, basic lighting research
      • LEDCube-C15: 15 channels, 350–700nm, color research
      • LEDCube-I14: 14 channels, 380–730nm, image testing
      • LEDCube-24: 18 channels, 350–780nm, comprehensive applications
      • LEDCube-C31: >31 channels, 350–1000nm, advanced research (including NIR)
      • LEDCube-HDR-5: 5 channels, 420–730nm, high dynamic range applications

    • Each LEDCube weighs approximately 7 kg. How is it installed?

      LEDCube offers very flexible installation methods for different applications, with three recommended installation methods:
      ① Simple ceiling mounting: Use dedicated steel chains to mount LEDCube from the ceiling. The pitch angle can be easily adjusted by changing the hook position on the back plate of LEDCube.
      ② Custom aluminum profile bracket: Custom aluminum profile brackets can securely and conveniently secure multiple LEDCubes, with height adjustment via a platform.
      ③ Munsell N7 standard viewing cabinet: THOUSLITE provides this standard viewing cabinet, which is very convenient for building a standardized viewing environment. Dimensions: 50×50×60cm.
      Please refer to Section 2.1 of the user manual for LEDCube product dimensions and installation details.

    • Can the LED wavelengths in LEDCube be customized or replaced?

      THOUSLITE provides LED channel wavelength selection service from UV, VIS to NIR.Please communicate with THOUSLITE or your authorized distributor to confirm the required wavelengths before placing an order.

    • What operating systems does the LEDNavigator-LC software support?

      LEDNavigator-LC currently only supports Windows operating systems, including Win XP, Win7, Win8, and Win10.

    • When controlling multiple LEDCubes, why do different LEDCubes sometimes emit different light when the same light source number is selected?

      Each LEDCube has independent internal storage for the light recipe of each light source number (the drive value of each LED channel). If different LEDCubes have different light recipes stored under the same light source number, selecting the same light source number will cause different LEDCubes to emit different light.

    • Why does LEDNavigator-LC sometimes fail to detect LEDCube?

      If this occurs, first check whether the hardware switch on the LEDCube device is turned on, whether the wireless transmitter and software dongle are inserted into the computer, and whether the LEDCube driver has been installed for first-time use. Then restart both the LEDCube hardware and the LEDNavigator-LC software. If the issue persists after multiple restarts, please contact THOUSLITE or your authorized distributor.

    • Why does the measured matching light source differ more from the target light source after Feedback?

      This generally occurs for two reasons:
      ① Unnecessary feedback: When the initial light recipe is already very close to the target value—for example, when the color temperature difference between the measured value and the target value is less than 50K—performing Feedback may worsen the result.
      ② Feedback uses the most recent measurement as the baseline. Please ensure a measurement is taken before performing Feedback.

    • What if a required function is not available in the LEDNavigator-LC software?

      THOUSLITE provides software customization services.Please contact THOUSLITE or your authorized distributor for details.

  • 3. LEDSimulator — Real Lighting Environment Colour Appearance Reproduction System

    • What is LEDSimulator and what are its main functions?

      LEDSimulator is a real lighting environment color appearance reproduction system launched by THOUSLITE, a flagship product for the textile and color management industry.
      Core functions:
      Total Appearance reproduction: Simultaneously reproduce the four attributes of Total Appearance—color, texture, gloss, and translucency
      Real-time color design: Visualize color effects at the design stage, reducing wasteful sampling
      Digital color communication platform: Shorten design cycles and enable digital transmission of Total Appearance throughout the supply chain
      Virtual-to-real matching: Visualize colors on multiple textures and match between virtual and real samples

    • How does LEDSimulator achieve “Total Appearance” reproduction?

      LEDSimulator achieves Total Appearance reproduction through:
      Color: Precisely reproducing target colors with high-precision multi-channel LED light sources
      Texture: Visualizing color effects on multiple substrates
      Gloss: Simulating color appearance under different surface gloss levels
      Translucency: Reproducing the color appearance of translucent materials
      The system combines the LEDView standard viewing cabinet with LEDPanel projection light sources to achieve real-time color design and appearance reproduction.

    • What color selection and matching functions does LEDSimulator support?

      LEDSimulator includes powerful color tools:
      ColorWay: Supports color selection, matching, and palette design
      Wide color gamut: Choose any color, not limited to the finite colors on color books or swatch decks
      Large color space: Explore millions of colors
      Physical matching: Match found physical objects to digital specifications
      File compatibility: Supports CIE L*a*b, LC*h, and QTX file formats for data communication

    • What observation window and substrate configurations does LEDSimulator have?

      LEDSimulator provides flexible observation configurations:
      3 observation window sizes: Accommodating different sample sizes
      Multiple substrates: For evaluating texture effects, supporting color visualization on different materials
      Substrates can be various materials such as undyed fabrics and paper. Colors are projected onto the substrates via LEDPanel.

    • What light sources are included in the standard viewing cabinet of LEDSimulator?

      The LEDView standard viewing cabinet included with LEDSimulator contains the following standard light sources:
      D50: 5000K standard daylight, CIE Ra 99, MI Grade A
      D65: 6500K standard daylight, CIE Ra 99, MI Grade A
      A light source: Incandescent light source, CIE Ra > 97
      All light sources have extremely high Color Rendering Index and Grade A Metamerism Index.

    • What is the “Light Dyeing” function of LEDSimulator?

      “Light Dyeing” is a unique function of LEDSimulator:
      • Projecting target colors onto undyed substrates through 2 LEDPanel projection light sources
      • Previewing color effects on fabrics without actual dyeing
      • Light uniformity >90%, ensuring consistent color presentation
      • Supporting any undyed substrate
      This function significantly shortens the color development and sampling cycle in the textile industry.

    • What is the purpose of the portable darkroom of LEDSimulator?

      LEDSimulator is equipped with a portable darkroom—a compartment covered by black cloth at the back of the viewing cabinet.Its functions are:
      Preventing ambient light interference: Ensuring color evaluation under controlled lighting conditions
      Improving evaluation accuracy: Eliminating the influence of ambient light on color judgment
      Flexible use: Can be deployed or retracted as needed

    • What industries is LEDSimulator mainly used in?

      LEDSimulator is mainly used in:
      Textile industry: Color management, supply chain color communication, sampling efficiency improvement
      Printing and dyeing industry: Color matching and quality control
      Coating industry: Color selection and appearance evaluation
      Automotive industry: Interior and exterior color design
      Digital supply chain: Total Appearance digital communication platform

  • 4. LEDView Lighting Cabinet

    • What is LEDView and what are its main uses?

      LEDView is an epoch-making lighting cabinet launched by THOUSLITE, based on multi-channel LED technology, specially developed for the color and imaging industry.
      Main uses:
      • Color evaluation in textile, coating, plastics, printing, graphic arts, and imaging industries
      • Color quality control
      • Ensuring consistent transmission of color standards throughout the supply chain

    • What Color Rendering Index (CRI) can LEDView achieve?

      LEDView achieves a Color Rendering Index CIE Ra of 99, one of the highest levels among standard light cabinets on the market.The Metamerism Index MI reaches Grade A (the highest international standard).

    • What international standards does LEDView comply with?

      LEDView complies with all major international standards for visual evaluation:
      • ASTM D1729: Standard Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials
      • ISO 3664: Viewing conditions – Graphic technology and photography
      • DIN, AATCC, BSI and other related standards

    • What standard light sources can LEDView simulate?

      LEDView can:
      • Accurately reproduce standard daylight illuminants: including D50, D65, D75
      • Blackbody locus simulation: Accurately reproduce a range of sources from 2000K to 20000K
      • 80 LED simulated sources: Hardware can store 80 LED simulated sources
      • Any lighting scenario: Reproduce any measured or imported SPD

    • What are the luminance and uniformity of LEDView?

      LEDView provides:
      • LEDView-C15 and LEDView-I14: Maximum illuminance >2500 lux on the bottom plate
      • LEDView-H11: Maximum illuminance >12000 lux on the bottom plate
      • Dimmable luminance: Both LED simulated sources and optional fluorescent lamps support luminance adjustment
      • Uniform and flicker-free lighting environment

    • What versions of LEDView are available and what are their respective applications?

      LEDView is available in five versions:
      • LEDView-Portable V2: 20 channels, portable, general visual assessment
      • LEDView-STD: 24 channels, surface color, textile/printing applications
      • LEDView-C15: 24 channels, lighting and color research and evaluation
      • LEDView-I14: 24 channels, image testing and sensor calibration
      • LEDView-H11: Ultra-high luminance applications

    • How many light sources can LEDView hardware store?

      LEDView hardware can store 80 LED simulated sources, which can be switched via the touch screen controller.LEDNavigator-LV software can reprogram the light sources in hardware, with unlimited storage capacity in the software.

    • Does LEDView support dynamic lighting and single-channel control?

      Yes:
      • Single-channel control: Arbitrarily control the intensity of each channel in LEDView to design any desired light
      • Dynamic lighting: Programmable illuminant light sequence and interval

    • How does LEDView ensure long-term stability?

      LEDView ensures long-term stability through the following mechanisms:
      • Fast and accurate feedback system: Maintains light quality by compensating for aging and variable environments with an external micro-spectrometer
      • Compensates for LED aging and variable environments
      • Optimized heat management, with significantly longer lifetime than traditional fluorescent lamps

    • What are the advantages of LEDView compared to traditional fluorescent light cabinets?

      Advantages of LEDView:
      • Color Rendering Index: CRI Ra up to 99, traditional fluorescent typically <90
      • Metamerism Index: MI Grade A, traditional fluorescent typically higher
      • Number of light sources: 80 LED simulated sources storable, traditional fluorescent only a few fixed types
      • Spectral tunability: Can reproduce any SPD, traditional fluorescent not tunable
      • Service life: Significantly longer than traditional fluorescent lamps
      • Warm-up time: No warm-up time, instantly stable
      • Luminance adjustment: All light sources are dimmable

    • Can the LED wavelengths in LEDView be customized or replaced?

      For the flagship LEDView models, THOUSLITE provides LED channel wavelength selection service from UV, VIS to NIR.Please communicate with THOUSLITE or your authorized distributor to confirm the required wavelengths before placing an order.

    • What operating systems does the LEDNavigator-LV software support?

      LEDNavigator-LV currently only supports Windows operating systems, including Win XP, Win7, Win8, and Win10.

    • Why does LEDNavigator-LV sometimes fail to detect LEDView?

      If this occurs, first check whether the hardware switch on the LEDView device is turned on, whether the USB data cable and software dongle are inserted into the computer, and whether the LEDView driver has been installed for first-time use. Then restart both the LEDView hardware and the LEDNavigator-LV software. If the issue persists after multiple restarts, please contact THOUSLITE or your authorized distributor.

    • Why does the measured matching light source differ more from the target light source after Feedback?

      This generally occurs for two reasons:
      ① Unnecessary feedback: When the initial light recipe is already very close to the target value—for example, when the color temperature difference between the measured value and the target value is less than 50K—performing Feedback may worsen the result.
      ② Feedback uses the most recent measurement as the baseline. Please ensure a measurement is taken before performing Feedback.

    • What if a required function is not available in the LEDNavigator-LV software?

      THOUSLITE provides software customization services.Please contact THOUSLITE or your authorized distributor for details.

  • 5. LEDPanel Multi-channel LED Calibration Source

    • What is LEDPanel and what are its main uses?

      LEDPanel is a multi-channel LED calibration source launched by THOUSLITE, an epoch-making lighting product for calibrating camera modules and sensors in production lines.
      Core uses:
      • Production line camera module calibration
      • Sensor calibration
      • Standardized lighting for imaging systems

    • What are the spectral range and color temperature range of LEDPanel?

      The technical specifications of LEDPanel are as follows:
      • LED channels: 4 channels default, up to 6 channels
      • Spectral range: 400–780nm
      • Drive method: Amplitude modulation drive
      • Channel resolution: 10 bits per channel, 1024 levels
      • Warm-up time: <1 second
      • LED lifetime: >10,000 hours
      • Color temperature range: 2700–6500K
      • Color temperature accuracy: < ±50K

    • What are the luminance and uniformity of LEDPanel?

      LEDPanel provides:
      • Luminance range: 10–2000 Lux (can be further increased)
      • Exit surface uniformity: LEDPanel-5050: 96±2%; LEDPanel-290224: 95±3%

    • What models of LEDPanel are available and what are the differences?

      LEDPanel is mainly available in two models:
      • LEDPanel-5050: Exit surface 50×50mm, uniformity 96±2%, max power consumption 8W, weight 0.5kg
      • LEDPanel-290224: Exit surface 290×224mm, uniformity 95±3%, max power consumption 15W

    • How many light sources can LEDPanel hardware store?

      LEDPanel hardware can store up to 80 name-editable light sources, which can be switched via the control box touch screen.

    • What are the stability and accuracy of LEDPanel?

      LEDPanel stability specifications:
      • Short-term repeatability: D65 < 20K, D50 < 10K; Luminance < 0.5%
      • Long-term repeatability: D65 < 25K, D50 < 15K; Luminance < 1.5%
      • Compatible instruments: Konica Minolta CL500A, THOUSLITE FS spectrometer, Jeti Specbos 1211UV spectroradiometer

    • What are the main application scenarios of LEDPanel?

      LEDPanel is mainly used in:
      • Production line camera module calibration
      • Sensor calibration
      • Standardized lighting for imaging systems
      • Supporting the “Light Dyeing” function of LEDSimulator

  • 6. LEDTrans Transparent Uniform Lighting Box

    • What is LEDTrans and what are its main uses?

      LEDTrans is an innovative transparent uniform lighting box launched by THOUSLITE, based on multi-channel LED technology.It is specially developed for test chart illumination and camera calibration.
      Core uses:
      • Test chart illumination
      • Camera and sensor calibration
      • Standardized lighting environments for optical imaging laboratories

    • What are the spectral range and color temperature range of LEDTrans?

      Technical specifications of LEDTrans:
      • LED spectral channels: 14 channels
      • Spectral range: 380–730nm
      • Drive method: Amplitude modulation drive
      • Channel resolution: 10 bits per channel, 1024 levels
      • Warm-up time: None
      • LED lifetime: >10,000 hours
      • Color temperature range: 2000K–20000K
      • CIE Ra range: 80–100

    • What are the illuminance output and uniformity of LEDTrans?

      LEDTrans provides:
      • Maximum illuminance: Up to 18,000 lux (exit surface)
      • Dimmable illuminance: Minimum 1% of maximum illuminance
      • Exit surface uniformity: >96% (exit surface 280×210mm)
      • Flicker-free: Based on AM drive method

    • What light sources can LEDTrans simulate?

      LEDTrans can achieve:
      • High-quality daylight simulation: D75, D65, D50, CIE Ra > 98, MI Grade A
      • Blackbody locus simulation: Accurately reproduce sources from 2000K to 20000K
      • A light source: CIE Ra > 97
      • Any Spectral Power Distribution (SPD): Reproduce any measured or imported SPD

    • Does LEDTrans support dynamic lighting and single-channel control?

      Yes:
      • Single-channel control: Arbitrarily adjust the intensity of each channel
      • Dynamic lighting: Programmable light sequence and interval
      • Fast light source switching: No warm-up time, instantly stable

    • How does LEDTrans ensure long-term stability?

      LEDTrans ensures long-term stability through:
      • Fast and accurate feedback system: Automatic feedback via external spectrometer
      • Optimized heat management system
      • Short-term repeatability: D65 < ±10K, Illuminance < ±0.5%
      • Long-term repeatability: D65 < ±25K, Illuminance < ±1.5%

    • Does LEDTrans provide an SDK development kit?

      Yes. LEDTrans provides SDK in different programming languages, allowing customers to further integrate it into their own control software.

    • What are the main application areas of LEDTrans?

      LEDTrans is mainly used in:
      • Optical imaging laboratories: Test chart illumination and camera calibration
      • Camera and sensor performance testing: White balance testing, color reproduction testing, resolution testing, etc.
      • Image calibration: Standardized lighting environments for imaging systems
      • Industrial inspection: Visual inspection lighting in smart manufacturing

  • 7. LEDSSF Camera Testing Equipment

    • What is LEDSSF and what are its main functions?

      LEDSSF is a camera spectral sensitivity function meter launched by THOUSLITE that can characterize the Spectral Sensitivity Function (SSF) or Quantum Efficiency (QE) of a camera.
      Core functions:
      • Spectral response curve characterization: Sampling camera spectral response curves through 19 LED channels
      • Color Correction Matrix (CCM): Providing CCM for any light source/material combination
      • Multi-material coverage: Materials include coatings, textiles, printing materials, plastics, and skin
      • 4 light source types: All CIE light sources, laboratory light sources, commercial light sources, and custom light sources

    • What are the spectral channels and spectral range of LEDSSF?

      • LED spectral channels: 18 channels
      • Spectral range: 400–700nm
      • Drive method: Amplitude modulation drive
      • Resolution: 10 bits per channel, 1024 levels (1000 levels usable)

    • What is the exit surface uniformity of LEDSSF?

      • Exit surface size: 3cm diameter (customizable up to 8cm)
      • Uniformity: >95% (3.6cm diameter)
      • Light-emitting area: 5cm diameter light-emitting area with 95% high uniformity

    • What types of light sources can LEDSSF measure?

      LEDSSF supports 4 types of light sources:
      All CIE light sources: International Commission on Illumination standard light sources
      Laboratory light sources: Commonly used laboratory lighting sources
      Commercial light sources: Commonly used commercial lighting sources
      Custom light sources: User-defined light sources

    • What measurement instruments are compatible with LEDSSF?

      LEDSSF is compatible with the following measurement instruments:
      • THOUSLITE FS spectrometer
      • THOUSLITE FS-VIS-IR spectrometer
      • Jeti Specbos 1211/1211UV spectroradiometer
      • Konica Minolta CL500A
      • Konica Minolta CS2000

    • What are the stability and accuracy of LEDSSF?

      • Warm-up time: None
      • Short-term stability: Luminance < ±0.5% (within 24 hours, room temperature 25°C)
      • Long-term stability: Luminance < ±1.5% (within 90 days, 30 minutes warm-up, room temperature 25°C)
      • Storage capacity: Hardware can store 80 name-editable light sources; software unlimited

    • What customization options are available for LEDSSF?

      LEDSSF offers the following customization options:
      • Exit surface size: 3cm diameter (customizable up to 8cm)
      • Housing color: LEDSSF: Black (default), L-shaped mixing chamber: White (default)
      • Additional charge accessories: Measurement instruments, custom brackets
      • Supporting software: Optional

    • What is a Color Correction Matrix (CCM) and how does LEDSSF provide it?

      A Color Correction Matrix (CCM) is a mathematical transformation matrix used for color correction, which can correct color data captured by a camera under different light sources to standard color values.
      LEDSSF can provide:
      • Color Correction Matrix (CCM) for any light source/material combination
      • Material coverage: Coatings, textiles, printing materials, plastics, and skin
      • Multi-light source integration: CCM applicable to comprehensive materials covering multiple light sources

  • 8. LEDMax

    • What is LEDMax and what are its main functions?

      LEDMax is a personalized color matching curve meter launched by THOUSLITE, a trichromator that enables the creation of custom observer color matching functions using the Maxwell method.
      Core functions:
      • Creating observer color matching functions using the Maxwell method
      • 18 channels for creating multiple three-color combinations for color matching
      • Generating LMS and XYZ color matching function results
      • Side-by-side hemifield matching setup with 2° and 10° fields of view

    • What are the spectral channels and spectral range of LEDMax?

      • LED spectral channels: 18 channels
      • Spectral range: 400–700nm
      • Drive method: Amplitude modulation drive
      • Resolution: 12 bits per channel, 4096 levels (4000 levels usable)

    • What field-of-view settings does LEDMax have?

      LEDMax provides side-by-side hemifield matching settings with 2° and 10° fields of view:
      2° field of view: Suitable for small-angle color matching (within approximately 4°)
      10° field of view: Suitable for large-angle color matching (above approximately 4°)

    • What color matching functions can LEDMax generate?

      LEDMax can generate:
      LMS color matching functions: Based on the response functions of the human eye‘s L (long-wave), M (medium-wave), and S (short-wave) cone cells
      XYZ color matching functions: The foundation of the CIE standard colorimetric system, used for color measurement and calculation

    • What are the observation window dimensions of LEDMax?

      • 2° field of view: Φ17mm
      • 10° field of view: Φ88mm
      • Replacement lens options: 2°, 4°, 6°, 8°, 10° (10° default)

    • What are the technical specifications of LEDMax?

      • LED spectral channels: 18 channels
      • Spectral range: 400–700nm
      • Drive method: Amplitude modulation drive
      • Resolution: 12 bits per channel, 4096 levels
      • Warm-up time: 10 minutes
      • LED peaks (±5nm): 405, 415, 432, 441, 449, 461, 475, 508, 526, 546, 549, 576, 595, 606, 636, 662, 675, 706
      • Electrical specifications: 100-240V AC, 50/60Hz, max 100W
      • Control method: USB data cable
      • Overall dimensions: 246×290×315mm
      Net weight: 12 kg

    • What is the Maxwell method and how does LEDMax use it?

      The Maxwell method is a color matching experimental method proposed by physicist James Clerk Maxwell and is one of the fundamental experimental methods in color science.
      LEDMax uses the Maxwell method by:
      • Allowing observers to compare and match the appearance of two colors through a side-by-side hemifield matching setup
      • Illuminating each side with two spectrally tunable LED systems
      • Creating multiple three-color combinations for color matching through 18 channels
      • Ultimately generating LMS and XYZ color matching function results to quantify individual color perception characteristics

  • 9. LEDSpace High Illumination and Uniform Light Source for Large Area

    • What is LEDSpace and what are its main uses?

      LEDSpace is a high dynamic large-area uniform light source launched by THOUSLITE, based on multi-channel LED technology, providing a large-area, high-uniformity standard lighting environment. It is suitable for applications requiring large-space or customized standard lighting environments.

    • What is the core technology of LEDSpace?

      LEDSpace is based on THOUSLITE‘s core technology—multi-channel LED spectral tunable technology and light quality management technology. Through carefully selected high-power LEDs and the proprietary LEDNavigator software, it can match any Spectral Power Distribution (SPD).

    • What scenarios can LEDSpace be used for?

      LEDSpace is suitable for:
      • Large-space standard light environment lighting
      • Customized lighting environment setup
      • Large-area object color visual evaluation
      • Color assessment of large products

    • How does LEDSpace work with other products?

      LEDSpace can work synergistically with other THOUSLITE products:

      • LEDView provides fixed-size standard lighting environments

      • LEDCube can be controlled individually or simultaneously via wireless technology, making it easy to build large-space or customized standard lighting environments

      • LEDSpace can be seen as an extension of the LEDCube principle to large-area applications

  • 10. LEDBTC

    • What is LEDBTC and what are its main uses?

      LEDBTC is a large, transparent, uniform illuminator launched by THOUSLITE using multi-channel LED technology.It is specially designed to provide a large transmissive target for testing camera quality.

    • What are the spectral range and color temperature range of LEDBTC?

      Technical specifications of the LEDBTC-T200150 model:
      • LED spectral channels: 14 channels
      • Spectral range: 380–730 nm
      • Channel resolution: 10 bits per channel, 1024 levels
      • Color temperature range: 2000–20000K (Duv tolerance < ±0.003)
      • LED lifetime: >10,000 hours
      • Warm-up time: None

    • What are the illuminance output and uniformity of LEDBTC?

      LEDBTC provides:
      • Maximum output: 3000 lux
      • Minimum illuminance: 1% of maximum illuminance (depending on the simulated light source)
      • Uniformity: >90%
      • Exit surface size: 200cm × 150cm

    • What light sources can LEDBTC simulate?

      LEDBTC can simulate:
      • D75, D65, D55, D50 standard daylight
      • A light source
      • Color Rendering Index CIE Ra > 98
      • Metamerism Index MIvis: Grade A (<0.25)
      • Hardware can store 80 name-editable light sources; software storage unlimited

    • What are the stability and accuracy of LEDBTC?

      LEDBTC stability specifications:
      • Short-term repeatability: ΔCCT < ±20K; ΔIlluminance < ±1%
      • Long-term repeatability: ΔCCT < ±50K; ΔIlluminance < ±2%
      • Compatible instruments: Konica Minolta CL500A & CS-2000, THOUSLITE FS & FS-VIS-IR spectrometer, Jeti Specbos 1211UV spectroradiometer

    • What are the main application areas of LEDBTC?

      LEDBTC is mainly used in:
      • Large transmissive test chart illumination
      • Camera quality evaluation
      • Image sensor testing
      • Standardized lighting for large imaging systems

  • 11. LEDHDR High Dynamic Range Light Source

    • What is LEDHDR and what are its main uses?

      LEDHDR is a high dynamic range light source launched by THOUSLITE, using multi-channel LED technology to provide extremely high luminance and dynamic range lighting output. It is suitable for professional applications requiring high contrast and high luminance lighting.

    • What are the illuminance range and uniformity of LEDHDR?

      LEDHDR provides:
      • Illuminance range: 10 ~ 250,000 lux (Measurement device: Jeti 1211UV-2 illuminance mode, position: center of the light source bottom)
      • Exit surface size: 620×320mm
      • Illuminance uniformity: >90%
      • Color temperature uniformity: >96%

    • What are the warm-up time and stability of LEDHDR?

      LEDHDR warm-up specifications:
      • Below 100,000 lux: No warm-up time
      • Above 100,000 lux: 15 minutes warm-up
      • Channel resolution: 4095 × 48 = 196,560 levels

    • What are the color temperature and Color Rendering Index of LEDHDR?

      LEDHDR color temperature and Color Rendering Index:
      • Default CCT: 6500±500K, or customizable
      • Color Rendering Index CIE Ra: >80, or customizable
      • Electrical specifications: 100-240V AC 50/60Hz, max 1000W

    • What are the main application areas of LEDHDR?

      LEDHDR is mainly used in:
      • High dynamic range imaging testing
      • High-luminance calibration of cameras and sensors
      • Optical evaluation of display panels
      • Professional lighting scenarios requiring extreme luminance contrast

  • 12. PMCC