karotto wrote:
Thanks everyone for your suggestions: Here are the exact specs of the
item:

Brand New PKG 1, Star Bright 1W Full Color 100 Lumen LM White Led

Lens Color : Water Clear

Emitted Color : White

Intensity Typ Iv (mcd) : 90~100mcd

Viewing Angle : 160°

Forward Voltage (V) : 3.0v-3.2v

Forward Current (IFM): 650mA

I guess it's not a Luxeon. Sorry. Are those specs wrong? Thanks again.

An LM317 with 1.92R (1.8R + 0.12R) between the common & output pins will
give you a constant 650mA.

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