Yeah, I've done that. It gets a bit expensive, though. The ones I bought were 2 for $10, so I'm only running them in the A/C controls right now. They have 1 LED firing straight out, and 4 firing out the sides, so 5 total. They're called 'refractor' bulbs. However, if you get the white ones, it will change the color of your cluster a bit. The red lights (Brake, Seatbelt, etc.) will become a bit pink, and anything that looks green (Illumination) will look blue. The yellow Check Engine light will probably be off-color too. But that's how the white LED's are. They're not as yellow as regular bulbs. IMO it is worth it to put these in, so you never have to pull the cluster to replace them. Or, you could always get a Nordskog digital dash, which never needs illumination.