LED Engin, Inc. (San Jose, Calfornia) claims a record in both flux and power density for high power, multi-colour LED lighting with its LZP family of red, green, blue and cool white (RGBW) emitters.
The 25-die, 80-W emitters deliver 3800 lumens, the highest luminous flux density from a 6.2 x 6.2 mm light emitting area on 12 x 12 mm emitter footprint. This has been achieved through an improved LZP package design that results in the lowest thermal resistance per package footprint of 0.5°C/W. LZP gives designers of entertainment and architectural lighting the freedom to create more powerful yet slimmer, very compact lamps in innovative new styles that appeal to customers. The emitter is the first of three new multi-colour products in LED Engin’s development schedule announced in April. The others are the LZ7 7-colour emitter and the ultra-high power LZ4 4-die RGBW, which can be driven up to 3 A/die.
The LZP series is available in two versions, featuring either a domed or flat glass primary lens for different applications. The LZP-00MD00 with its glass dome lens is typically used with a total internal reflection (TIR) secondary lens to deliver high flux output. Typical applications include architectural lighting, including wall-wash fixtures and accent and effect lighting. The flat lens of the LZP-04MD00 is suited to stage and studio lighting where beams of less than 10 degrees are often required. Its compact étendue (measure of how the light output is distributed over solid angle) facilitates the use of zoom optics, mixing rods, light pipes or other optics to produce narrow beams.
Using only three of the new LZP emitters, illumination equivalent to that from a typical 10,000 lumen (approximately 700W) HID bulb used in profile lamp can be achieved. Light absorbing colour filters are not needed, so efficiency is greatly improved. With 25 mixed-colour dice arranged closely, the LZP series simplifies board and circuit design. It also enables a more