Seoul Semiconductor’s SunLike natural-spectrum LEDs adopted by WILA for human-centric lighting

South Korean LED maker Seoul Semiconductor Co Ltd says that its SunLike Series natural-spectrum LEDs (developed in collaboration with Toshiba Materials’ TRI-R spectrum technology in 2017 as the first LED light source to closely match the spectrum of natural sunlight) have been adopted by personalized lighting specialist WILA Lighting (part of The Nordeon Group) of Oxfordshire, UK, for its new Visic product range.

Visic is a uniquely shaped recessed ceiling luminaire (with textured surfaces and soft contours) that features a human-centric lighting design closely matching the spectrum of natural sunlight. The technology lowers the blue light peak to be similar to sunlight’s spectral curve in order to reduce scattered reflection and glare common in conventional LEDs. This is achieved with SunLike Series LEDs, which are said to promote well-being by creating a more healthy and productive working environment in offices and educational buildings.

The Visic luminaire is extremely efficient, operating up to 162Llm/W, with a Unified Glare Rating (UGR) that achieves low glare UGR<19 rated in accordance with International Commission on Illumination (CIE) discomfort glare evaluation system, enabling lighting designers to meet challenging design requirements.

Seoul says that its SunLike Series natural-spectrum LEDs have been identified as a key light source for promoting human well-being, based on the results of a recent comprehensive sleep study conducted by professor Christian Cajochen and his team at the University of Basel in Switzerland (‘Effect of Daylight LED on Visual Comfort, Melatonin, Mood, Waking Performance, and Sleep’, Journal of Lighting and Research Technology, 24 March). “We have evidence that a daylight [natural spectrum] LED solution has beneficial effects on visual comfort, daytime alertness, mood, and sleep intensity in healthy volunteers,” Cajochen says.

Light sources with SunLike Series LEDs are said to more accurately show the colour of objects as they would appear in natural sunlight. Optimized to natural light spectra and a colour rendering index of CRI-97 (close to the CRI-100 of sunlight, and higher than the CRI-80 of conventional LEDs), it is claimed that SunLike Series LEDs deliver significant benefits in vivid colour, contrast detail, and quality of light consistency.

The SunLike Series LEDs have also achieved the highest level of eye-safety certification from the International Commission on Illumination as an RG-1-level light source with no photo-biological risks.

“As the paradigm of lighting shifts to human-centric lighting, there is an increasing demand for healthy light sources for people who spend a lot of time indoors,” says Seoul Semiconductor’s Europe sales VP Carlo Romiti. “Beyond the function to illuminate the darkness, light sources with SunLike Series LEDs certainly bring differentiated value to the lighting industry compared to conventional LEDs,” he adds.

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