I'd say the e+Lite is about the size of two Photons side by side. It uses CR2032 batteries, which will also work in the white Photons (albeit with a lot less light output but long runtime) The only concern I have is the durability of the plastic swivel where the headlamp connects to the base, but so far no problems. FWIW, I bought mine as a backup headlamp and wound up using it more than my primary.