I've had several real Photons over the years and while the size was a real plus, was never really satisfied with the switches....granted they were exposed to the elements hanging on a key ring... especially with the ignition switch location on the HD Sportster...and all failed at some point

got good service from a Coast LED, but the batteries were as much as the light

in an attempt to eliminate switch problems went to a Gerber Tempo LED with a single AAA with twist cap

most recent EDC is a Fenix E01 LED which is about 50% brighter than the Tempo and with a lithium AAA is pretty light in weight

in an unsuccessful attempt to standardize batteries to AAs and Ds, just purchased a Black Diamond headlight, and earlier got the Sanyo Eneloop rechargables with Goal Zero PV cell and charger

wasn't successful with the standardization as a couple of the cheaper headlamps use AAAs and weapon's lights use 123s but I'm working on it

if you have an extra $55 burning a hole in your pocket, and have an older SureFire 6P incandescent... get the Malkoff drop in 200 lumen module... its pretty impressive...