NICHIA Ultra-High CRI: Optisolis™ LED: closest possible match to
Nichia Optisolis LEDs with the full spectrum of sunlight
The latest innovation in LED development is the Optisolis
technology form world market leader Nichia. The full-spectrum
NF2W757G-F1 and NF2L757G-F1 Optisolis LEDs are the first capable of
generating a light spectrum that comes closest to that of the sun.
The Optisolis family of packaged LEDs are Ultra-High CRI light
sources because as they have maximum scores for all 16 of the color
samples that are used in the color rendering index metric. The
5000K Nichia NF2L757G-F1 Optisolis LED can even achieve a Ra of 99
out of 100. Similarly, the scores with the new IES TM-30-15 light
quality tests are equally high, with Rf at 98 and Rg at 99.
As the above test shows, the Nichia Optisolis has the highest light quality on the
market at the time of this article.
This extraordinary result is achieved by using a revolutionary new
phosphor technology in combination with a special blue LED chip.
The spectrum of the blue chip is 420nm, contains almost no UV
emissions and combined with the phosphor technology make possible the above mentioned CRI values. The lack of violet or ultraviolet (UV) spectral energy in the emission and
reduced blue light peak are very important aspects in many lighting
applications such as Human Centric Lighting, Museum and Art Gallery Lighting or Horticulture.
Human Centric Lighting is a special type of lighting that adapts to
the human inner clock and thus to the biorhythm. The Optisolis
natural light spectrum fits perfectly because of the Ultra high
CRI. The lack of UV light and reduced blue peak will ensure overall
health and sleep patterns are only positively influenced.
For Museum and Art Gallery Lighting the Optisolis LEDs with the almost maximum CRI and TM-30-15 light quality scores will deliver the most faithful
reproduction of colors and the best understating of the artist's
message. The lack UV light will safeguard precious works of art from light related damage.
Additional applications include Horticulture, with the daylight
spectrum leading to optimal plant growth in greenhouses or enclosed spaces, color evaluation (e.g. painting, printing), commercial lighting
(e.g. retail, etc.) or other applications where Ultra-High CRI is
Human Centric lighting
‘Human-centric lighting’ describes lighting that is designed to
work with the human body’s natural rhythms. It relies on the
well-established fact that the human eye detects the presence of a
particular wavelength of blue light in the spectrum that makes up
sunlight, and uses this to judge what time of day it is. In this
way, light helps regulate our sleep–wake cycles and other bodily
rhythms, and has a significant impact on our mood and well-being.
Human-centric lighting harnesses this effect by adjusting its
brightness and colour temperature during the day to mimic natural
light. To achieve its purpose, human-centric lighting must have a
spectrum that resembles that of real sunlight, with just the right
level of the crucial blue wavelength that triggers the body’s
response. Most solutions described as human-centric do not have a
spectrum that resembles that of real sunlight, so they end up
providing too much or too little blue.
Nichia Optisolis LEDs are different, as are their light is closely
matched to real sunlight, so they have the right level of blue that
trigger the desired biological stimulus.
Commercial lighting revealing true color of merchandise
Nichia Optisolis light fixtures merchandise will look as under
natural light, with the same color and contrast. The high quality
light spectrum is expressed by both the traditional color rendering
index (CRI) and the new Color Fidelity Index. Tests confirm, with
CRI at 97+ and TM30 Fidelity Index at 96, values that indicate the
high accuracy of reproducing the original color from 99
representative color indexes.
Light to reveal true color and depth for works of art
The Nichia Optislos LEDs uniform spectral power distribution
enabled by a three-phosphor mix render art naturally, ensuring that
visitors will fully experience color and texture. Paintings,
frescoes, mosaics, sculptures and many other exhibits will have a
lifelike appearance with more realistic color tones relative to any
prior lighting. Moreover, the light from Optislos LEDs result in a
high contrast ratio that means viewers can better perceive depth —
and therefore the texture — in the works of art.
The first to implement Nichia Optisolis lighting are museums in
Germany: Zeppelin Museum in Friedrichshafen, the Ludwig Museum in
Koblenz and the Picasso Museum in Münster.
The difference between the previous lighting system, with CRI80
LEDs (LEFT) and the new Nichia Optisolis CRI98+ (RIGHT) is clearly
visible in the case of the paintings housed in the Zeppelin Museum Friedrichshafen.
Manufacturers should choose Optisolis™ where they want to deliver a
lighting product with a spectrum where all colors are reproduced as
seen under a standard light. (Figure 1). As such, they will offer a
solution with a color rendering index that has been significantly
improved compared with the current products for general lighting.
(Figure 2) Most importantly, since UV emission is essentially
non-existent in the spectrum, the degradation of irradiated
materials will be reduced dramatically compared to that of other
light sources containing UV emission, including other market
The Optisolis family consists of two series, the NF2W757G-F1 and
NF2L757G-F1. Both series are housed in a 3 x 3 x 0.65 mm package.
- CRI: up to 99
- Typical luminous flux:
- NF2W757G-F1: 23.0lm at 65mA
- NF2L757G-F1: 24.1lm at 65mA
- Max. forward voltage: 3.3 V
- Radiation angle: 120 °
- +120°C maximum junction temperature
Applications of the Optisolis full-spectrum LED
- Museums and art galleries
- Retail lighting
- Commercial Lighting