Originally Posted by Conker
LEDs = electrical = will fail sooner than later.
Maybe chemlights? Crack, shake, cut open, paint liquid on the round, wait 5 mins to dry, and should light for a couple hours. Definitely not as long as the whole thing would, but should be long enough.
Just an idea.
As soon as you crack open a chemlight, you only have a couple minutes of any kind of glow left. You have to have an anaerobic environment for the glow to persist. That's why in Predator 1+2 they had to reapply the KY Jelly/Cyalume mix like crazy to keep his blood "fresh". :P