In reply to The Lemming:
The Myo XP is very good.
The beam is quite bright and the boost function is useful for "spotting" things.
I've had two as I managed to lose my first! Two things to bear in mind...
1, The unit is not fully waterproof as it has a small hole to let heat from the LED dissipate. (probably not an issue unless to intend to go caving with it)
2, Put new batteries in it before you rely on it as mine decided to start turning itself off whilst front pointing with 2000ft between my legs (had recently put in new batteries and only used it to get in tent for a few nights beforehand!)