Go with this one or this one.

I have the 0.5 W one as a backup to my generator and it is a good be-seen headlight. While it has some side visibility, most of the light is thrown forward, and it is also good as a flashlight or even to illuminate a path if you're stuck in the dark.

The 1W one is fairly new in the market and therefore should start to be available soon. Subject to autonomy and price considerations, it could be a better choice than the 0,5 W one.

Their design is damp-proof but not water proof, but once I added some electrical tape around the seal, it has become water proof enough to endure a 1.5 hour downpour without problem.

The Planet Bike Superflash is also a very good taillight, but installing electrical tape around the seam is also a very good idea.