I have a NiteRider MiNewt 600 Cordless light which the Lumina series replaced. Both models are USB rechargeable. I have rather poor eyesight, but even the 400 lumen setting is usually bright enough and lasts a good 3 hours. The Lumina may well have even greater battery life.

I also have a NiteRider Minewt 150 cordless light that I mount to my helmet. It's great for seeing around turns; shining at car drivers before the pull out in front of me; and looking at wildlife in the woods.

I also like the redundancy of having two lights in case one dies. That's why I also have two blinkies in the back and tires with reflective sidewalls on my night bike.