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This is a "10 Watt" High Power LED - COOL WHITE (see other listings for warm).

This LED is constructed from 9 die in a 3s3p (3 parallel strings of 3 series die) arrangement to give a forward voltage at max current around 10 to 11v.

The recommended current is about 900mA.

NOTE! I personally test each one to ensure all die are operating normally.

STOP! High power LEDs must be current limited* or driven with a constant current supply and must be attached to a fairly substantial heatsink Do not simply attach to a "10v" (or even higher) supply, your LED would be most likely destroyed instantly. (* Yes I know this is a generalisation, I'm not going into describing IV curves here :-) )

All high power LEDs produce a LOT of heat. Do not even think about running it without a heatsink for more than a second.

Passive cooling will require a fairly large heatsink. I typically look for a rise-above-ambient of no more than 45 degrees measured at the LED tabs when stabilised, of course, the colder you can run them, the more reliable and longer-lived they will be.

A typical old Pentium-4 style heatsink can just-get-away with passively cooling a 10W led attached with heatsink tape in most climates.

Smaller heatsinks can be used if you actively cool them (heatsink with fan).

[ 10w-led-3x3-cool-white ]