Reader Opinion

The Value of Dark Skies - About Environmentally Friendly Lighting

Figure 4 shows a comparison of the spectrum of white LEDs (solid lines) with the response of the human visual system in the photopic regime [...] Read more »

Reader Opinion

Lighting Flicker of LED Lighting Systems

We've just added two charts about flicker from Philips. They have presented it at the L+B last week. Read more »

Reader Opinion

Lighting Flicker of LED Lighting Systems

It would be interesting to know details about the VLC modulations (amplitudes and frequencies) and how they are fitting into the borders mentioned by Walter. Read more »

Reader Opinion

Lighting Flicker of LED Lighting Systems

I am sorry for possible confusion. I have made the statement as clear as possible. This is how it is: (above 100Hz:) up to 400 [...] Read more »

Reader Opinion

Lighting Flicker of LED Lighting Systems

This is a comment from a reader to the article in LpR#54: I’m a bit confused about the article about flicker. On the one hand, [...] Read more »

Reader Opinion | Mar 19, 2016

Discussion: The Value of Dark Skies - About Environmentally Friendly Lighting

Discussion: The Value of Dark Skies - About Environmentally Friendly Lighting For many years no one worried about light pollution: on the contrary, the brighter the better. Then it became evident that darkness also has its value. J. Scott Feierabend, executive director of the International Dark-Sky Association (IDA), presents and explains in detail, the latest ndings and suggestions published in the “New IDA LED Lighting Practical Guide” and “New IDA Standards on Blue Light at Night”. He also discusses how to illuminate public areas while avoiding excess light pollution. Read more »

FEATURED

Cree Launches Industry’s Highest Efficacy 90 CRI COB LEDs

Cree Launches Industry’s Highest Efficacy 90 CRI COB LEDs Cree, Inc. announces the XLamp® eTone™ LEDs, a breakthrough set of chip-on-board (COB) LEDs that delivers beautiful 90 color rendering index (CRI) light quality at the same efficacy as today’s standard 80 CRI LEDs. Delivering up to 155 lumens per watt (LPW) at 3000 K CCT, 85°C, Cree’s new eTone COB ... Read more »

FEATURED

Luminus Gen 4 COBs: 70W CMH Spots Finally Meet Their Match

Luminus Gen 4 COBs: 70W CMH Spots Finally Meet Their Match Luminus Devices latest, fourth generation chip-on-board LED technology (Gen 4) will open new opportunities in retail lighting and a wide range of indoor and outdoor lighting applications. Luminus Gen 4 COB technology combines significant improvements in efficacy, flux density, high maximum drive ... Read more »

EDITORIAL

High Conductive Foils Enabling Large Area Lighting

High Conductive Foils Enabling Large Area Lighting Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP as one of the leading partners for research and development for surface technologies and organic electronics and Sefar AG, a leading manufacturer of precision fabrics from monofilaments, developed a roll-to-roll ... Read more »

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