(2) 35W bulbs = 70W total draw
If you're running 12V, divide 70W by 12V and you get 5.8A, give it a little extra leeway and call it 7A.

The thing about fuses is that they're not designed to protect the equipment they're wired to, they're designed to protect the wiring itself.
So size your fuses to the wire gauge you're using and you'll avoid damaging the wires if they rub against a ground and short out while maintaining maximum current available to utilize.
Most electrical components that are sensitive to amperage have built in fuses anyway.