the led 150 will do you mate nice tight beam 5 hours plus lamping time will do the range you want no probs.if you want a wider beam the dl100 would do you well and is a fare bit smaller than the 150 same range as well
Will any of them little built in battery lamps come with a dimmer at some point, could do with summet for some sneaky whizzin about local sessions at some point but I like me dimmers..
no at the moment mate but hope to have some beter red lights in the futcher that mite do the sort of thing you are after