Are your 960's black or silver? Have you messed with the bulbs inside them?
If they are black, they come with 55W bulbs stock.
If they are silver, they come with 110W bulbs stock.
I have the black ones but swapped out the bulbs for the higher wattage ones.
Antitree_hugger is right about amps & volts. Anytime you're trying to figure out what kind of amps a set of lights is sucking out of your electrical system, it's whatever # of watts divided by 12 volts ... so if you have the silver 960's, then 220W / 12 volts = 18.3 amps. So you would need a 20 amp fuse.
Let us know if you get it figured out or if you need some more help, I've learned a lot about wiring lately.
