Originally Posted by 1993 SLE
will the Halogen bulbs fit into the wedge base sockets? do they make a wedge halogen?
Not that I know of, since the wedge-base socket is usually plastic or some sort of flexible rubber stuff, which would probably melt under the heat of a halogen bulb.
However, there are higher-intensity wedge-base bulbs available that might fit those sockets. Numbers like #921 are used as high-mount brake lights, so you can imagine how bright those suckers are.
The interchange numbers are a little non-intuitive (i.e. there'* no logic that I know between higher numbers and higher power of bulb), but you can get the same bulbs repackaged as low-voltage lighting bulbs in home & garden centers like Home Depot. Those are listed specifically by wattage, so you can pick out a 7-watt bulb, 11-watt, 14-watt or whatever. Depending on the brand of bulb you're buying, some actually have their industry interchange number printed on the bulb, too.
But again, I gotta warn you that if you do put high-intensity bulbs in any of the red lights in back, you may attract the attention of nitwits (either with or without badges) who think you're riding the brakes (e.g. flashing their headlights at you, yelling at you at stoplights or whatever). Good luck.