Lights

The batteries are not waterproof but can be made so with a bit of waterproof sealant.

Buy one , for the price you will not be disappointed. I have a couple and they are something like 3 years old and still going strong.

Review of the generic type here http://forums.mtbr.com/lights-night-riding/review-ebay-1800-lumen-cree-xml-t6-led-bicycle-headlight-lamp-759177.html

Would the batteries last 3-6 hours though? I used to use mine in winter and I had to charge it every 3 days and that was just over a 1hr riding a day and on flash mode, rather than full beam...