size of bulb in instrument cluster
 

i want to change my gauge lights but im unsure what size bulb i need to get.

What vehicle/year/model ?? What effect are you trying to accomplish ??

2000 sc2, and i want to change the stock (halogen looking) color to either blue or red.

i found a pretty good description of how to change the regular bulbs to blue leds on the saturnspot forum but with my 2000 sc2 it uses a different bulb then the one described... any help?