It's all about your purpose-are you looking for the brighttest, the one with longestr battery life, or the one where the bulbs last longest!

Personally as a vet when i am in the field doing operations in fields i use the petzl tikka-very intensive beam for a short range, is a headlamp so my hands are free and the batteries seem to last a while!!!

There are loads of posts on this on the site-do a search!

Mark