LED Lighting Explained
- The Book
Technical Briefs from Philips Color Kinetics address topics and issues critical to the LED lighting industry — topics such as the useful life of LED light sources, the importance of delivered light, and the shortcomings of CRI for evaluating the color quality of LED light. Typically 4 to 10 pages each, Technical Briefs offer up-to-date, reliable information about LED lighting for consumers, designers, specifiers, and other lighting professionals. Please return to this page often as we post new Technical Briefs for free download.
Useful Life: Understanding LM-80, Lumen Maintenance, and LED Fixture Lifetime
LED light sources rarely fail — but like all light sources, they fade away over time. This 8-page Technical Brief describes how LED sources are tested under the new LM-80 standard, and how to accurately compare the useful life of LED sources with the rated life of conventional sources.
Download [PDF: 427 KB]
Evaluating Light Output: Using Delivered Light to Specify and Compare LED Lighting Fixtures
Raw lumen output is an important photometric measurement for all light sources, but it can be misleading when used to compare the light output of LED lighting fixtures and conventional luminaires. This 12-page Technical Brief describes in detail why lumen measurements can misrepresent the effectiveness of LED lighting fixtures in different applications, and how to use delivered light to make accurate comparisons between LED and conventional lighting solutions.
Download [PDF: 3.5 MB]