street glow and the battery.??

i already have quite a bit of neon setup on the interior. its rigged to the cigarette lighter positive and ground wire. this includes 4 dash neons (each 3 inches long) and 4 under dash/under seat neons (2 12inch neons, and 2 6 inch neons) and 2 rear neons (2 6 inch ones) thats a total of 10 neons. i am going to be investing in the under car kit soon. my question really is how much can i set up and how would i go about rigging this? would it be ok to power that many neons on the car battery? or would i see a difinitive decrease in power? i certainly dont want any sort of overload. should i rig a fuse to everything or what? to give you an idea, the under car kit has 4 tubes (2 48 inch tubes, and 2 30 inch tubes) yep, its gonna glow alot!