Has anyone replaced the stock bulbs of their foglights with higher wattage bulbs? If so, which kind of bulbs and what wattage?

I'm considering getting foglights. I'd like to get some input re the stock bulbs and replacement bulbs. Kasi, if I decide to replace them, gusto ko sana, isang kabitan na lang.

I'd appreciate it if you guys can chime in and provide me with some useful info.