In reply to CharlieMack:
Many of the newer Petzl headlamps have a light sensor and automatically adjust the output from 5-10lm up to the set level when you look at near/far objects. I have a Nao that does this and I like this feature, it preserves the battery and means you don't trash your night vision looking at the map or at your feet.
I really can't tell from their website if the Actic does this. but
maybe the 60hr life is with that feature enabled - so the average light output will be rather less than 300lm?