One must use caution with this LED. Extremely powerfull. Operates from a 3vdc source. Pinout as follows from left to right....wire #3 is+ and wire #4 gnd as pictured. It will work with a couple 1.5 vdc batteries. Warning.....do not have it directed at you or anything living with eyes....If it were collimated a bit....what power. I think I have some lenses that may do the trick....portable red floodlamp...possible navigation lamp for aircraft. This was mounted on a TEC and heatsink assy.