IF you are going to be putting in neons never just stick it somewhere. ideally you will not want to see the tube at all, and if you mount it somehwere where the tube is visible black out one side w/ electrical tape. when you have the direct light like that it is very bright and doesn't look nearly as cool (imo) the best way is to have indirect light and to ahve it glow from an unknown source, lighting the entire floor with lights from under the seats and dash is always fun.
There are little LED clusters that you can conceal quite nicely too if you wish to highlight a certain area such as your instrument panel. As far as powering them the best thing to do would be to properly connect them, there is nothing worse then to see a big cigarette lighter block w/ a bunch of wires coming from it. If you have to i would even consider runing power from the battery itself much like you would for an amp and throw a switch on there to control all your lights (that is assuming you want to put in ALOT like those competition cars).....
you can pick these lights up pretty much anywhere, usually any car audio store or even a futureshop type place will carry a few, cold cathode (the neon tubes), EL wire --> wire that lights up neon.....and leds are all cool....liquid neons are kinda cool too but get old fast, i had one and paid alot for it but meh, its pretty weak, proably because i got some lame ass multicolored one instead of just blue lol, well im not sure n e of that actually tells you anything, but i want to see some pics once you have put it all in! ill put pics of mine up if and when i install them , i still have them all from my old car so we will see
