fingers said:
The Luxeon 1 which you are buying is being replaced by the K2 because it can withstand the remperatures of being reflowed through the SMT Oven. Otherwise the Luxeon K2 has pretty much the same spec as its original. To run these high power LEDs anywhere near their ratings requires them to be attached to a larger heatsink.
The angle of these LEDs is 140deg, which isn't a great deal of use without attaching the lens to focus the light. Not bright enough to light a room, not precise enough to use as a torch. Still good fun to play around with so long as you don't look directly at them.
I know hes wholesale, so Im wondering if they are over stock. I was going to use them to light up part of the basement. I was going to attach them to a old florescent hanging thing (what ever you call them, they hold the bulbs and hang from the celing) and use that as the heatsink. The Area Needed to be lighted is small, and Im thinking it would be another good project.
According to the data sheet, they can use up to 1500mA :O! I was hoping they used 350mA Of current, but I guess not! but still, 140 deg is close to 180, which is what "normal" lights output at.
I have found 2 circuits, and I dont know which one to go by. They dont say what units they measure in, they are only light meters. I was thinking I could measure some other way, ie if 1 lumen is 1 candle at 1 foot, lighting up 1 sq ft of surface, then I could draw something up and measure that way. So for example, if at one foot, A LED lights up 2 sq feet, that would be 2 Lumens, Correct? Or would it be 2 lumens at 2 feet lighting an area of 2 sq feet.
I could also build the circuit, and measure 1 candle from 1 foot away and calibrate from there. That would tell how many Candles my LEDs are, but not Lumens or candela.
And whats a "torch" in LED terms?