If your talking about the ones in your bumper, they are: H3 12v 55w, you can get higher wattage bulbs but I would get +30% or +60% brighter bulbs as they're still legal.
12v 55w +30% is the equivalent to 12v 80w bulb.
12v 55w +60% is the equivalent to 12v 100w bulb.
The bulbs have a different gas in and the filament has been moved, but at least you won't burn your wires out or damage you lamps using higher wattage bulbs.
Also, Could you tell me where i could get some dash board bulbs? what sort they are, and how many i would need to do dials, speedo etc. and the heater bits etc. Thanks Conor