The new Energy Star draft specification loosens the requirements for uniform beam distribution in omni-directional lamps and updates flicker and lumen-maintenance requirements.
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LEE BOON HOOI explains that color ratios held over from the CRT world won’t deliver optimal color with RGB LEDs, but simple calculations can determine a proper mix.
Finite-difference time-domain simulation in 3D is necessary to verify the light extraction efficiency of LED architectural enhancements, but a faster 2D method can allow for quicker iterations for testing new ideas during product development, write Chenglin Xu and Dan Herrmann.
The second-generation XP-E2 LEDs include royal blue, blue, green, amber, red-orange, and red options and are drop-in, higher-output replacements for earlier models.
SSL fixtures installed in roadway curbs and adjustable LED spotlights for pedestrian and vehicular tunnels preserve the historic look of Nîmes while providing effective route markers and ambiance.
Adaptive SSL implementations will be capable of varying the range of headlights based on vehicle speed or widening the beam to illuminate sidewalks in city driving.
A violet LED combined with red, green, and blue phosphors yields a lamp that Verbatim says will render fine details and color nuances in objects better than other white-LED approaches.
Litecontrol, Plextronics, InnoSys, and Universal Display win funding for various OLED research projects as the DOE seeks to push the SSL technology toward broader commercialization.
