Originally Posted by canklecat

Check the sticky thread on bike headlights under $50. It's on old thread so jump to the end for opinions on the most recent lights.

There are lots of good headlights for under $50, most of which will be weather resistant. The self-contained light/battery lights from Serfas, Light & Motion, Niterider, Cygolite, Planet Bike, Portland Design Works and many others are all pretty comparable.

Most are USB rechargeable. Serfas, Planet Bike and PDW still offer a few lights that use AA or AAA batteries. I have a Serfas SL-255 that uses a pair of AA's as a backup light and it's fine for the purpose. Mostly I use it with rechargeable NiMH AA batteries for economy. The advantage is you can buy batteries for this almost anywhere.

There are some very inexpensive generic LEDs from various Chinese manufacturers being sold under too many brand names to keep track of on Amazon, ebay and elsewhere. Many of these consist of separate lights and battery packs. I don't know whether these are weatherproof. Some reviewers complain of defective batteries, but these can be replaced. Check the Amazon reviews. But they offer a lot of light for the money.