So im thinking of getting 1 or 2 of these and stacking them, for use as headlights, is this just a horrible idea. My main concern is light output http://www.ebay.com/itm/7-5-36W-LED...Parts_Accessories&hash=item19e8a4e9ba&vxp=mtr
did you use something like this? http://www.ddmtuning.com/Products/GT-LED.GT-Series-LED-Work-LampsI used a square LED lamp from DDM Tuning as a headlight for a while. Worked pretty well as a low beam riding around town or well-lit highways. It was really thin so that was good. I would try to get two with different beam patterns so you can have high/low still.
did you use something like this? http://www.ddmtuning.com/Products/GT-LED.GT-Series-LED-Work-Lamps
out of curiosity, how did you mount the lower one on there?check out this thread... http://www.customfighters.com/forums/showthread.php?t=66061
They are cheap chinese knockoff's. They work really well. No issues driving in extended rain storms. Great light out put.
I aimed the smaller one a bit lower.. as the low beam
I tilted the larger one to give a long range for high beam.