Done it all, and quite happy. Very beautiful blue all over, incldn: Courtesy lights, overheads, any orginal green LED was changed to blue, All internal dash lights but the really dinky ones (e.g. the turn signals, trans postion lights....ect.), including the ingition, cigerette lighter, sunroof switch, cruise switch, defrost switch, seat memory switch, master window switches (it's how i screwed myself by trying to fix the full auto down for the drivers side ), blues in all the symbols for climate control *hard, need to use tinfoil to get more internal reflection, and painting it with silver aluminum like does NOT work and actually made it worse then the foil, and it takes a bit of work to get it so the bulb doesn't just make the floor switch, and air recycle switch brighter then the others*, External door key light on drivers side, ashtray- none cuz there's no reason for me to go in there, basically you name the spot, i've got it there.
Places I don't recommend them:
Glove box- way too hard to get the light to refract so you can still see what's inside, so it stays dim mostly, but super bright in one spot.
Trunk- you won't be able to see anything
I even stuck 4 bulbs in there hoping it'd help.
Dome main courtesy- leave the area to dimmly lit, and hard as hell to find something if you drop it unless it's litterally pitch black out
and anything with those bulbs that are less then 1/4 inch behind the gauges, it's really hard to get work in there, and to lacking in space to get a resistor their, and no it won't work if you link wires around to it, unless you do it for every bulb, and every bulb is seperately triggered buy someing in the car, say like being in 4 gear as opposed to 3rd.
Thing I recommend: heh- really wish I could keep some of this to myself to be extra unique, but i'm always glad to help you all out here.
If you switch the green stock LED's to some other color, cut the tips of with something like a dremmel disc cutter, then dab paint ( i used silver, but it doesn't matter ). the reason you do this is so you 1, aren't driving a big blue ball down the road....as these things seriously are bright, and 2, so you don't blind yourself or any other on lookers driving beside you as I did notice at some angles it severly for a moment, could blind the person in that other lane, 3, you'll never be able to play a game of cat and mouse again if you don't since if you duck into a dark alley you'll stick out like a sore tumb as they stay on when ever the car is running.
Use tinfoil or something else to get more internal reflection in areas where a piece of plastic is used to deflect the light around.
use eletrical tape, or something similar to keep the tips of the + & - end of the LED from touching where needed.
soildering is a simple and easily reversible process as opposed to cutting of something, as it T-Taping in some situations. ( I just soildered everything ) In the door lights, I soildered them to the contacts for the regular bulbs then aimed them properly (give the sweetest glow to my rims when I have my two front doors open.
The LED's work great as undercar lights for many reason as long as you can protect them well enough. They don't use nearly the energy Neon does, they will virtually never burn out and neon does, you can leave them on for weeks and not drain your battery at all, they are very discrete and you don't have to worry about smashing them into something if your ride is droped, you can use them as wheel back lights, and well, virtually everying.
Not sure what else, but I know there is more. If you have any Q's feel free to ask, I've tried lights everywhere. And the really great ones are the UV ones....on a white set of gauges that with blue...they have this amazing look, but I opted to stay with blue, much easier on the eyes.
I did this for about 3 days straight going through every bulb, but the time was well worth it, as I'm VERY SATISFIED. And the compliments never stop. I'll post some picks of the final look when I stop working 15 hour days next week. Till then..
PS- All these ideas are protected by patents, copyrights, etc.....and don't try it at home unless you light lawsuits.
HA- Just Kidding