The main lamps are H4 bulbs, and the fog lights are H3 bulbs. I have had good luck with the +30 Hella H4 bulbs I got from Susquehanna at http://catalog.com/susq/hella.htm
, and used Dichroic Hella H3 fog bulbs because I prefer the yellow fog lights. The so called +30 H4 lights by Hella, Philips, etc. use the same 55/60 watts as the standard H4 bulbs, but supposedly have repositioned filaments and added a trace of xenon gas to put 30% more light on the road from the same wattage. They were a lot cheaper than PIAA as well, which I have heard burn hot, have a short life, and don't put as much usable light on the road because they filter out wavelengths that aren't blue. Hope this helps.
87 300E, 65k miles