In the past I used the Zebralight H31 Headlamp (CR123 battery, 220 lumens) but during the 300 mile Everglades Challenge last year, it died on only the second night. My backup H31 died just before the EC started. In both cases the electronic switch leaked, both died from just operating with wet hands and being in a damp PFD pocket.
Since then I have been using a Fenix HL 21 headlamp ( http://www.amazon.com/Fenix-Flashlights-HL21-Headlamp-Black/dp/B004XN5MBW/ref=sr_1_1?ie=UTF8&qid=1391528063&sr=8-1&keywords=Fenix+HL+21+headlamp ) and have been impressed. I regularly wash it/dunk it and it has held up very well.
The Fenix is not as bright as the Zebralight, at 90 lumens, but has better waterproofing (IPX-8 versus IPX-7 for the Zebralight), is less expensive, uses a single AA, and has good throw (nice for finding channel markers at a distance, not as nice for doing close work where a more floody light is best).
I much prefer the single battery lights to the common three AAA types. The design of the single-battery lights are easier to make waterproof.
YakCatcher Rod Holder
Bent Shaft Canoe Paddles
2-3 Canoe/Kayak Trailer
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