Stupid H4 headlight question

I'm converting to H4 bulbs on my 'Cuda, as well as running the headlights off relays. The factory bulbs are in the 60watt range, the bulbs that came with the conversion headlights are 90/100watt. Any side effects of going to that wattage of bulb? Just a brighter bulb that demands more current, correct? I plan on wiring all new 12 gauge wire in/out of the relays, that should be able to handle it, it should just be a brighter bulb right?

This fish outta have artificial daylight coming outta it lol.