Hi,
So this is all new to me!
I got myself a bicycle light, it has a LED a CREE XD16 and running on a single 18650.
Info on the LED:
1.6 x 1.6 mm
Maximum Drive Current 2 A
Max Power (W) 6 W
Max Light Output (lm) 726 lm
Maximum Efficacy at Binning Conditions (lm/W) 172 lm/W...