I just started using the Ironman ILS helmet. It has a white light in the front and a red one in back. Only downside is they don't blink. It's very easy to recharge, and I've gotten lots off comments about it.
I also use a blinky on my camelbak. And if I ride in the pitch dark (vs. at sunset) I use a light and motion helmet mounted light. It works great. But I must say the L&M's are a bit pricey! We've actually had ours for a few years.