Seoul Semiconductor’s Sunlike Series Natural Spectrum LEDs Adopted by Korean Premium Brand for Human-Centric Lighting

July 19 [addtoany]

ANSAN, South Korea (JULY 19, 2019) – Seoul Semiconductor Co., Ltd. (KOSDAQ 046890),
a leading global innovator of LED technology, announced that its SunLike Series natural
spectrum LEDs have been adopted for the Korean premium brand “PureLumi” for a product
line which combines the human-centric lighting enabled by the SunLike Series LEDs with an
air purifier.

PureLumi is a premium product line that delivers both air purification and smart residential
lighting, delivering on the promise of “Healthy Light and Clean Air for Your Space.” The
brand has adopted SunLike Series natural spectrum LEDs, as they produce light closest to
natural sunlight. The natural spectrum light produced by SunLike Series LEDs delivers
beneficial effects on visual comfort and human circadian rhythm control to provide users with
health and well-being benefits beyond simple illumination.

Seoul’s SunLike Series natural spectrum LEDs are the world’s first LEDs to produce light
that closely matches the spectrum of natural sunlight, delivering human-centric lighting by
reaching a lower blue light peak similar to sunlight’s spectral curve, and by reducing
scattered reflection and glare. SunLike Series 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 Prof. Christian Cajochen and his team at the University of Basel in
Switzerland. The paper, entitled: “Effect of Daylight LED on Visual Comfort, Melatonin,
Mood, Waking Performance, and Sleep,” was published in The Journal of Lighting and
Research Technology on March 24, 2019. Quoting from the paper: “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.”

In addition, during July 2018, the Biomedical Information Laboratory at the Seoul National
University College of Medicine in Korea conducted research on adults using desk lamps
based on Seoul Semiconductor’s SunLike Series natural spectrum LEDs. The researchers
found that SunLike Series LEDs resulted in decreased eye discomfort and better sleep
patterns. 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.

The light sources with SunLike Series LEDs more accurately show the color of objects as
they would appear in natural sunlight. Optimized to natural light spectra and color rendering
of CRI-97 – close to CRI-100 of sunlight, and higher than the CRI-80 of conventional LEDs –
SunLike Series LEDs deliver considerable benefits in significant vivid color, detail contrast,
and consistent quality of light.

“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,” said Nam Ki-bum, sales
executive vice-president of Seoul Semiconductor. “Light sources with SunLike Series LEDs
certainly bring differentiated value to the lighting industry, compared to conventional LEDs.
We will expand the global market for customers and consumers who wish to experience our
human centric lighting solutions.”

Seoul Semiconductor developed SunLike Series natural spectrum LEDs 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.

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About Seoul Semiconductor
Seoul Semiconductor develops and commercializes LEDs for automotive, general illumination,
specialty lighting, and backlighting markets. As the second-largest LED manufacturer globally
excluding the captive market, Seoul Semiconductor holds more than 14,000 patents, offers a wide range of technologies, and mass produces innovative LED products such as SunLike – delivering the world’s best light quality in a next-generation LED enabling human-centric lighting optimized for circadian rhythms; WICOP – a simpler structured package-free LED which provides market leading color uniformity and cost savings at the fixture level, providing high lumen density and design flexibility; NanoDriver Series – the world’s smallest 24W DC LED drivers; Acrich, the world's first high-voltage AC-driven LED technology developed in 2005, including all AC LED-related technologies from chip to module and circuit fabrication, and nPola, a new LED product based on GaN-substrate technology that achieves more than ten times the output of conventional LEDs. UCD constitutes a high color gamut display which delivers more than 90% NTSC. For more information, please visit www.seoulsemicon.com/en.