bulbs.com

link:

http://bulbs.com/products/product_de...nventory=11649

I tested the 35W energy saver bulb (50W equivalent output) last night using my 5AH battery. With my 2mAH strobe running at the same time (37.4W total) the battery lasted an hour before the light started to yellow and the strobe started flashing more slowly. I try not to drain my batteries all the way, so I stopped the test.

Since my commute is now longer than an hour, I won't be able to use the brighter bulb for now (unless I upgrade my battery, looking at some NiMH deals on the web.) But I might mount two 20W energy saver bulbs on a three-way switch, so I can use either bulb or both at the same time, which means I can save my "brights" (70W equivalent, or two 20W energy saver 35W equivalent bulbs) for those dark descents.