LED Technology News

NICHIA — Ultra-High CRI: Optisolis™ LED: closest possible match to natural light

With the full spectrum of sunlight

The latest innovation in LED development is called NF2W757GT-F1 Optisolis. The full-spectrum LED from world market leader Nichia is capable of generating a light spectrum that comes closest to that of the sun. This is achieved by a revolutionary new phosphor technology and a special blue LED chip. The spectrum of the 420nm chip contains almost no UV emissions and in combination with the phosphor achieves a CRI value of almost 100.

A main application to Optisolis application is Human Centric Lighting - a special type of lighting that adapts to the human inner clock and thus to the biorhythm. In addition, Optisolis can be used wherever an extremely high CRI is required, e.g. in operating theatres in hospitals.

Manufacturers can utilize Optisolis™ and trust in a spectrum where all colors are reproduced to the color seen under a standard light. (Figure 1) Also, color rendering index 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 can be reduced dramatically compared to that of other light sources containing UV emission, including other market available LEDs.

Target applications include Museum and Art Gallery Lighting, where the highest CRI is preferred, but UV radiation and light sources can be detrimental. Additional applications could include Color Evaluation(e.g. painting, printing), Commercial Lighting (e.g. retail, etc.) or anywhere Ultra-High CRI is desired.

The Optisolis family consists of two series, the NF2W757G-F1 and NF2L757G-F1. Both series are housed in a 3 x 3 x 0.65mm package.


  • CRI: 95
  • 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
  • Hospitals
  • Retail lighting
  • Commercial Lighting

Human Centric Lighting, a return to daylight basics

Human Centric Lighting

For most of history, humans lived, worked and slept under the governance of natural light. The flickering light of candles was a poor substitute and did little to change the rhythm of life for all but the wealthy few.

Life went on under a dynamic light ,with changing tone and brightness, as a day went by and seasons changed. Then, one day, electric light was invented and everything changed. From that point forward a "golden hour" or "afternoon" could be at any time of day, on any point on the planet or beyond, outside or inside, from our living room to a windowless office or deep underground.

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New LED design for increased performance and optimised lighting fixture cost

New Led Deign, the Flip Chip

When making a decision to purchase LED lighting technology we are usually put in the balance price and cost of ownership, the reason behind this being that LED technology is general more expensive. 

However, the current market penetration rate of LED shows the argument that lower cost of ownership due to energy savings and long product lifetime is more than worth price difference is convincing.

This approach can have serious problems when the promised long term savings do not materialize. A LED can fail or degrade sooner that expected due to many reasons, from false advertising (the LED design could never perform as advertised), poor handling of heat management to mistakes in the product design. A customer faced with this issue could loose trust in the LED technology.

The solution is to reduce the price of LED products without a compromise of performance and quality. Innovation is the way to do it as is the case of Nichia's new LED design with Direct Mountable Chip technology.

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