LED light panel help?

Thread Starter

hawkins990

Joined Sep 26, 2012
3
I am getting a 100w led driver with 32 - 36v output, 500 red diodes, wavelength 660nm with forward voltage of 2.0 - 2.2 and forward current of 20ma. I know that I can use an led calculator to determine what size resistor and wiring diagram but how do I know how many LEDs I need to use 100w?
 

mcgyvr

Joined Oct 15, 2009
5,394
um is it a crappy chinese "constant current" driver... I bet it is...
please post a link or specs to the driver.
 

KJ6EAD

Joined Apr 30, 2011
1,568
You need 2381 LEDs (100W / (2.1V X 20mA)). If you use that constant current supply with only 500 LEDs, you'll have to waste 79% of the available power heating resistors!
 
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