Hey, thanks again for the help.

I'm really not happy with 1000bulb.com ones for selling me such crappy bulbs compared to those at batteryspace (which are really good if they're similar at all to Nightrider’s). So I'm just going to power the snot out of them on a 9 volt source (bulbs are 6 volt).

Also, there's another question on a slightly different topic. Sorry if there's a better place to ask this question, but have any of you guys tried the Trail Tech 30W HID light?

I just got one and am very happy with it’s initial performance. However, one thing caught my attention is the manufacturer recommends a power source of 12 volts minimum. Now, I know that batteryspace.com sells it with a lithium pack of 11 volts, but still--are there any issues with running these off lithium batteries. I know one thing the bulbs really hate is insufficient voltage, which causes hard ion impacts (or something) and destroys the filament. It seems like you might your lithium pack could get low enough to still have 1/3 or more power left but be at a voltage that cuts down the bulb life.

My goal is to make this bulb last as long as possible and I'll buy a whole new battery if necessary.

What do people think?

Thanks again.