As a matter of interest -
Has anyone tried making a home-build canister torch by taking a normal decent-powered rechargeable torch, something like:
http://www.7dayshop.com/catalog/prod...ducts_id=86543 (or maybe one of the torches that you plug the battery pack from a cordless drill into).
...then disembowelling it and sticking the internal bits into a canister made out of drainpipe or whatever?
I think I can handle the mechanical bits of making a waterproof canister, lighthead etc, but the electric bits confuse me... this seems like a feasible shortcut. Anybody tried it or got any opinions?