fuses protyect the wire so the load of the bulbs and the AWG of the wire have to be in agreement. wire too small and it becomes the fuse. Fuse too big and you have the same thing. heavier wire with lighter fuse is a good combo.
like 16AWG for a circuit that would have been 18AWG and if the cir had a 15A fuse that would be fine as the wire can hold up longer. too small of a fuse and it will pop for no reason