ok, this has been happening for a while now so if anyone knows whats wrong please help.

Whenever i leave my HID's on for about 10 min (without car running), and then I goto start the car, the car wont start. The funny thing is that the battery is still green (meaning still fully charged), I can still bump my system and everything, but it just wont start. This only happens when I have my hid's on for more than 10 min, otherwise its fine. Does anyone know whats wrong?