my right fog light went out on my 96' do i have to replace the whole light or can i just replace the bulb

 

Replace just the bulb.

Do you have xenon bulbs in? Both times that I put xenon bulbs in at higher wattage than recommended, they burned out both times. Now I have Eurolite bulbs that are same wattage as stock, and the have yet to go out(had them for about 5-6 months).