I just ordered a couple of birthday presents for myself... a Malkoff LED module for a SureFire 6P, and a Black Diamond AA LED headlamp....will comment when they arrive..

I've had good service from a lowly MagLight 2D LED that was a price buster last hurricane season at Lowes for $12, though never had to run one continuously

I replaced the Photons with a Fenix E01 with lithium AAA for EDC as I had problem with switches