I just love it.

This morning, I felt like I could really see the road, especially when there were no cars or street lights to help me, and that was with just 20W. I rarely used both 20W beams together.

A couple of times, cars actually waited on me. They definitely saw me coming.

I think the 4.5 amp (or 5 amp) sealed lead acid battery is perfect for my commuting needs. I don't need more than 60 or 75 minutes of run time and I can recharge at the office (I could even recharge from a car's cigarette lighter.) The battery supports 20 watts for about 135 minutes at full brightness (it would support 10 watts for about 4 1/2 hours.) It works well when recharged frequently, that is, after being only partially discharged. It's very reliable and inexpensive. When it reaches the end of it's life, I can replace it easily for less than $30. Also, the lights can be replaced for about $6 each and are available in many places, though they are supposed to last quite a while.