When Colors No Longer Play Tricks – THOUSLITE’s Spectrally Tunable Technology at IFCV 2026— A technical conversation on the essence of color perception – with gratitude to all who joined us

From April 25 to 28, 2026, Beijing hosted the International Forum on Colour and Vision Science (IFCV 2026). THOUSLITE brought its spectrally tunable technology to the forefront, showcasing four core products – LEDCube, LEDView, LEDSSF, and LEDMax. Throughout the event, professionals from display, camera, automotive, textile, coatings, and research sectors engaged in deep technical discussions around key questions: “How can we fundamentally solve observer metamerism?”, “How do we trace a camera’s spectral sensitivity?”, and “Can a personalised colour matching function replace the CIE average?” This was more than a product exhibition – it was a thoughtful technical dialogue on the very nature of seeing.

LEDCube – Any SPD Simulator: your personal “light lab”
The spectral power distribution (SPD) of a light source directly determines the colour of an object under that source. Even two sources with the same correlated colour temperature can make the same object appear different if their spectral compositions differ. This is the physical root of metamerism. LEDCube is built on proprietary algorithms and uses more than a dozen carefully selected LEDs with different peak wavelengths to accurately match any SPD. Covering 350–1000 nm, it delivers CIE Ra>98 and Metamerism Index Grade A, with colour temperature tunable from 2000 K to 20000 K and wireless control of up to 256 units. The Colour Rendering Index (CRI/Ra) measures how faithfully a source renders object colours – the closer to 100, the better. The Metamerism Index (MI) Grade A represents the highest international standard for inter-observer consistency. With its Ra>98 and MI Grade A, LEDCube stands at the forefront of spectrally tunable lighting devices, widely used for camera sensor calibration, health lighting, and colour science research.

LEDView – Standard Lighting Cabinet: no more colour shifts under different lights
Consistent colour management is one of the most challenging aspects of supply chain operations – the same batch of products can look different under different light sources. This is exactly why a standardised illumination environment is essential for stable colour reproduction across the supply chain. LEDView leverages multi-channel LED technology to achieve Ra=99 and MI Grade A – surpassing every competitor on the market. It complies with major international standards including ASTM D1729, ISO3664, and AATCC. The daylight illuminants it reproduces offer the highest achievable light quality for industrial colour evaluation, ensuring “what you see is what you measure”. For textiles, coatings, plastics, printing, and imaging – LEDView is a reliable tool for colour assessment and quality control, delivering consistent colour standards across the supply chain.

LEDSSF – Camera Spectral Sensitivity Meter: a spectral “ID card” for your camera
The Spectral Sensitivity Function (SSF) describes how a camera sensor responds to different wavelengths of light, while Quantum Efficiency (QE) measures the sensor’s ability to convert incoming photons into an electrical signal. Together, they form the fundamental basis of a high-performance camera colour system. Before multi-channel LED sources, precise SSF measurement required an extremely complex monochromator system. LEDSSF features 19 LED channels, an exit surface uniformity of >95%, and simultaneously measures SSF and QE. It also provides Colour Correction Matrices (CCM) for any illuminant and any material – coatings, textiles, plastics, even skin. As one of the few commercially available devices for SSF/QE characterisation, LEDSSF gives cameras a traceable colour archive.

LEDMax – Personalised Colour Matching Function Instrument: let your own data speak
The LMS cone response functions describe how the three types of cone cells (L, M, S) in the human eye respond to different wavelengths. Natural inter-individual differences in spectral sensitivity explain why the statistically averaged CIE standard observer can fall short in high-precision applications. LEDMax employs the Maxwell method, 2×18 multi-spectral LEDs, and a patented dual hemi-field design. By capturing an individual’s real visual response data, it generates a personalised Colour Matching Function (CMF), offering a scientific solution to observer metamerism. This ends cross-industry observer metamerism – because every person’s visual system is unique.

Technical resonance, in-depth conversations
Over the three-day event, the THOUSLITE team held one-on-one technical discussions with more than a hundred professional visitors. Colour engineers from leading display manufacturers highly appreciated the SPD matching accuracy of LEDCube, calling it a new enabler for standardised test light sources. Several camera module makers expressed strong interest in LEDSSF’s SSF measurement capability and scheduled follow-up technical demonstrations. Multiple colour science researchers, after diving deeply into LEDMax’s personalised CMF concept, saw it as a promising direction for the future of vision science.

Event photo gallery

Further reading
● “How do cameras ‘see true colour’ – Key applications of multi-channel LED calibration light sources in camera production lines” – An in-depth look at how spectral distribution, colour temperature and colour rendering affect camera imaging, and the practical use of calibration light sources in production.

About THOUSLITE
Founded in 2014 and headquartered in Changzhou, Jiangsu, THOUSLITE is a high-tech company specialising in multi-channel LED spectrally tunable technology and light quality management, serving markets across America, Europe and Asia. The company masters three core technologies: spectral power distribution tuning, colour management, and light quality management. Its products comply with CIE, ANSI, IES, ISO and other international standards, and have earned German FOGRA ISO3664 certification. Core products include LEDCube, LEDView, LEDSSF, LEDMax, LEDPanel, and LEDTrans, widely used for camera sensor testing, colour science validation, industrial colour matching, healthy lighting, and vision research. THOUSLITE is committed to advancing the standardisation, quantifiability and reproducibility of light environments through precise spectrally tunable technology.