LED news and insight from our technology editor Steve Bush, who has been messing with LED lighting for more years than he would care to remember.
Lumileds hits 10,000 lm with CoB arrays, at 100 lm/W
Aiming at replacing 70-100W ceramic discharge metal halide (CDM) lamps, Lumileds has introduced ‘Luxeon CoB 1211′ arrays – with a 19mm diameter light source on a 28x28mm tile.
Efficacy is 93-130 lm/W, depending on colour temperature and CRI of the luminaire.
The 10,000 lm and 100 lm/W figure comes a 70CRI device over-driven at 2.5A – maximum current.
The maximum typical output is 5,600 lm from the 4,000K, 5,000K and 5,700K (85°C, 70CRI) versions at 1.2A (35.5V) where efficacy is 130 lm/W.
This drops to 3,875 lm and 90 lm/W for the 2,700K – which offers a remarkable 97 CRI typical (90min).
Thermal resistance is 0.19°C/W junction to case.
1211 is the last four digits of the part number – LHC1-xxxx-1211
CoBs can be screwed down and soldered to – making them luminaire-maker-friendly, and there are a variety of connector assemblies that both hold then down and connect to CoBs without solder – even more friendly.Tags: CoB, Lumileds