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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...

CSP LEDs crawl toward delivering on SSL promise (MAGAZINE)

Chip-scale packaging (CSP) technology has the potential to reduce LED component cost and provide SSL system-design advantages, explains Maury Wright, but the technology, borrowed from the mainstream semiconductor industry, has been slow to emerge commercially. The...

IES publishes lighting specification for sports fields and venues

IES RP-6-15 covers recommended lighting practices for recreational to professional sports fields and venues with specific guidelines for individual sports. The original version of this article can be found...

Market programs and regulations hold back HCL in the US (MAGAZINE)

Stan Walerczyk, principal of Lighting Wizards, describes the challenges of implementing human-centric lighting in the US but also sees opportunity to positively impact our wellbeing. The original version of this article can be found...

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...