Tuesday 16 April 2019

exposure - How to relate LED Lumens to Lux at a given distance?


I'm trying to design an LED light, but I'm not sure how many LED's I need for a given light level.


Specifically, the Luxeon LXR7-RW57 1000 lumen white LED (data sheet)


Q: How many lux should I see at 1 meter with just one of these LED's? (Assuming no reflector, and a radiation pattern as in the data sheet page 16)




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