I have an autometer boost gauge mounted behind my steering wheel (like the stock location on wrx's) and its a black face and came with a little yellow bulb that you can put a little red or green or blue nipple over to change the car. Does anyone know the size of this bulb? I am wanting to replace it with a red led so it shows up better at night and so it matches my interior lights. It is so dim, that you can barely tell its on at night. If anyone could help, that would be excellent.