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Old 1st December 2009, 01:13 PM   #1
jarthel is offline jarthel  Australia
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Default help with Cree super bright LEDs

DealExtreme: $5.36 Cree XR-E Q5 Emitter on Premium Star (228LM at 1A)

According to that website, I get the the most lumens if the LEDs is being supplied with 1A.

It's easy enough to connect them to a current source regulator. it seems the LED has a Vf of 3.7V@1A. does that mean I require 3.7V for every LED I connect in the series? e.g. 10x LED = 37V?

thank you very much for the help
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Old 1st December 2009, 01:38 PM   #2
djQUAN is offline djQUAN  Philippines
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yup.
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Old 7th December 2009, 02:43 AM   #3
jarthel is offline jarthel  Australia
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thank you
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