Lumileds delivers second-generation COB LEDs, 10% efficacy gain

Gen 2 Luxeon COB Core Range LEDs increase performance in the same footprint as the first round of Lumileds COB LEDs, enabling development tradeoffs in performance relative to source size.

Lumileds has announced the second-generation Luxeon COB (chip-on-board) Core Range of packaged LEDs that deliver 10% gains in efficacy and flux output, while matching the footprint of prior
products. Called Gen 2 COB products, the family includes COB LEDs with light-emitting surface (LES) options that range from 9–19 mm.


As with many second-generation products, the new Lumileds COB LEDs offer product developers a number of options in new or refreshed solid-state lighting (SSL) lamps and luminaires. The common footprint means that designs can easily be refreshed for higher output while using existing ecosystem components such as holders, optics, and heat sinks. Or developers can reduce the size of new SSL products or take advantage of a smaller LES while maintain the same flux output as prior-generation designs. And remember a smaller LES can enable better beam control or what Lumileds competitor Cree has called optical control factor (OCF).

Lumileds provided some examples of the development options. A product that used the 15-mm-LES 1208 COB LEDs could be upgraded from 3600 to 4000 lm with a simple LED substitution. Or a developer could use the new Gen 2 LED, keep the output the same, and realize an increase in efficacy from 115 lm/W to 140 lm/W.
Evidently, the performance upgrade also applies to the CrispWhite family of LEDs that Lumileds announced last year for retail and other applications where excellent white-point and color rendering is required. The LEDs were announced at LightFair International 2014 and use a mix of emitter types and a new phosphor formulation.

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