I've just been out in the cossie, and it's safe to say that my headlamps are totally pants

They barely even illuminate the road immediately in front of the car.
I've got the standard bulbs in place and have 13.7V at the connectors with the engine running...
What wattage can I safely uprate the bulbs to?
I'm thinking get the biggest high beams I can, and a bit more wattage on the dips too - any suggestions?
I can't run to Morrettes or HiD setups either
Neil.