I changed my A/C panel lights.Now it's Bright neon blue.
I went to Advanced AutoParts and bought OPTX 6" Ultra mini neon (BLUE) for $17. And simply install it in(It also comes with adaptor). Looks very nice
Sorry do not have pictures yet.
You can also get 3" neon it will be easier to install(i do not think you will need to modify enything).
P.S.To install 6" neon in to your A/C control panel you will need to modify black frame inside of your A/C control panel(cut it a little bit on the top of each side) For 6" tube to fit in (it's no flexible).
Here is link to e website were you can buy it. Click Here!