Im looking at going with a 20 watt 10 degree spot with a 35 watt 24 degree narrow flood. The plan is to use the 20 watt most of the time, but add in the narrow flood while descending. I am also waiting on my xenon amber strobe to arrive. I have looked at various batteries, and will probably go with SLA for now, and down the road get the nimh 10 amp hour D batteries, when I can afford it. My question is, should I go with the old 8lb brick 10AH to run the system or drop 2 lbs and go with around a 7AH? I will likely lose 8lbs over the next month and a half, so not sure if carrying the battery will be that big of a deal. I already run with panniers and such, and did the hilly 50 miles at bucks county fully loaded, including my floor pump. anyone think it will make that much of a difference on a 10 mile hilly commute?

****Just noticed that the 8lb battery is 12AH**

Also, as I stated in an above post, I am interested in making a helmet spot. wondering what a good watt is for something like that, and the degree I should consider. I could probably make a small battery pack that I could keep in my pocket for that.