All I gotta say, is the 30watt bulbs [cars run like 55? I think] But 30 would allow you to run more in different directions. Like 2 up close right infront of the cart, and 2 for far out away from the cart, then 2 more for pointing kinda more up, for tree branches and stuff [assuming its an offroad cart] Motorcycle battery's are good because their small and light.