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IES explores luminuous flux maintenance projection method developments using LM-80 data

The IES is considering feedback from the LED industry on projection methods for testing and defining additional long-term behavior changes in LEDs that are not addressed in the current version of TM-21. Jianzhong Jiao describes possible models and updates under...

CIE should endorse TM-30-15 color rendition metrics post haste

The Illuminating Engineering Society (IES) has published a Technical Memorandum (TM-30-15) defining a new pair of metrics intended to characterize the color rendition of light sources. The original version of this article can be found...