These LEDs are high power up to about 2.5W each, up to 700mA current draw 3-3.5 V forward voltage. This listing is for cool white.
Personally I would run this type of LED at 1W so they run cooler and have an increased life at the expense of a bit less light. These leds are often referred to as a "3 Watt LED" by many sellers, I don't know why since physics say they are at best 2.5W and as far as I know there have not been any recent earth shattering rewrites of those fundamental laws of energy, anyway that's why this listing is called "1W to 3W", since that's what people are searching for, I'm a total slave to marketing!
The actual colour temperature (K) range and lumens (LM) may vary from batch to batch. These are China sourced LEDs, so even if I have “specifications” of light output or efficiency I wouldn’t trust them. Generally speaking Cool is in the 6000K+ , Warm is in the 3000-4000K range, if you really really want to know ask a question and I’ll give you the specs I have for current batch, if I have specs.
** STOP! ** YOU must understand how to use an LED, otherwise you'll kill them instantly, right, if you don't know how to drive an LED, do yourself a favour and learn with cheaper ones. You WILL need to heatsink these to something (not necessarily an actual heatsink), they generate a lot of heat if you are running them flat out, see my other listings for 1 and 3 led aluminium mounting plates, and heatsink tape. Don't forget to limit the current or they WILL die instantly.
