The designers of the Dior façade facing 57th Street in New York, NY, used over 450 LED LitePads from Rosco to create a glowing pattern with a color temperature of 5300K and 3500 lux. (Photo courtesy of Dior).
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LIGHTING
Model Lighting Ordinance: Is the BUG rating method effective at limiting light trespass?
The MLO offers two different options for evaluating the off-site impact of different outdoor lighting design schemes, but unfortunately they do not give the same results, according to WENDY NORMAN and MICHAEL SMOLYANSKY.
COLOR SCIENCE
Understand color science to maximize success with LEDs
George Kelly explains that color science is especially important in LED-based lighting, and participants across the SSL industry need a basic understanding to succeed in realizing light systems with optimal color rendering and quality.
STANDARDS
JEDEC test standards and LED package reliability
LED packages that pass JEDEC tests are more reliable in real-life applications, but as yet there is no way to use the results of severe stress-testing of LED packages to project their rated life, as JIANZHONG JIAO explains.
DISTRIBUTION
Lighting distributors make big move toward LEDs
While two years ago just 61% of lighting distributors stocked SSL, Ted Konnerth reports that the number has climbed to 91% even as lighting manufacturers and distributors struggle with the complexity of LEDs and electronic driver circuits.
DESIGN FORUM
Match LED driver topology and implementation to application
LED driver capabilities vary by application explain Tony Armstrong and Jeff Gruetter. Applications such as automotive headlights or projectors can require large strings of LEDs and/or very high drive current.
LAST WORD
LED wafer bonding is enabling when used properly
LED manufacturers must choose the appropriate materials and processes to fight low yields, writes THOMAS UHRMANN of EV GROUP.
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COMMENTARY
Many lessons remain in mastering LED lighting
NEWS + VIEWS
- Cree Lighting announces striking street-light luminaire
- Philips appoints Eric Rondolat as CEO of Lighting business
- Strategies Unlimited projects $3.7 billion LED retrofit lamp market
- DOE refreshes PAR38 L Prize, Philips ships A-lamp
- IES publishes LM-82 for testing LED lighting products at temperature
- NEMA publishes standard for retrofit lamps