Don't you just love working under the sink with a flash light in one hand, a wrench in your other hand, and a backup wrench in your other hand? Oh, wait, ran our of hands. Balance the flash light in your tool box, point it in the wrong direction, and now you can't see.
For strap on head lights, I like these:
Walmart used to have LED conversions for mini mag, by Nite Ize. If you take out the bulb and reflector from one of these head lamps, the conversion module and new reflector fit in, nicely. Good light, and longer battery life. Lamp runs on two AA cells, which last a lot longer than three AAA cells.
. Christopher A. Young Learn about Jesus