Amazon.com: GE NIGHTHAWK 893 Halogen Replacement Fog Light, (1 Pack): Automotive
And with that said, the purpose of the fogs is to cut through... well fog... The best light for this is actually a yellow tinted bulb and you'll even see new luxury cars these days with yellow tinted halogens in the fogs. A great bulb for this is the Nokya Hyper Yellow.
As for the headlights, if you are running stock style housings then the Phlips Xtreme Power 9003 is the best bulb currently available that fits 94-04 housings. However, since you have a 94-98 car you can run the DEPO projectors and Philps HIR 9011/9012 bulbs in those which is going to be the brightest available halogen headlight setup for the car period.
2000 Mustang GT Steeda build #48. Bolt ons, suspension, Novi 2000.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.