Led won't stay on help

Chevyguy86350

Newly Enlightened
Joined
Dec 20, 2017
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7
I don't know if this is the right section but here goes. I have two identical spotlights one I put Cree xp-e2 red in works great, second one I put Cree xp-e red and it just turns on and shuts off voltage is around 2.1, I tested with another Cree and it works like it's supposed to
 
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