I've got an Energiser led headtorch, runs on 3 x AAA's and is completely brillliant as you hardly feel it on your head, lasts for a good 10+ hrs on a set of batteries, AND has this really useful red-light mode (why?, you might ask is that useful? Because you can make a hole in a ceiling, stick your rods through it with the light attachment on the end, go into the loft using the red light and by looking carefully can normally see the light shining through the insulation, no more pulling piles of hairy insulation around.)
:devil::devil::devil: - had to put these, for post count reasons.