You see Chavs they just stick them on where they are visable, if you take time and put them in inconspicous places and are visable makes you not a chav, lol.
I'm not putting neons or LED's on the exterior of my MIcra until I have some sort of body kit, but as it's getting darker sooner these days interior leds are good.
Get yourself down to Halfrauds and look in the Prism section There's some Blue Flood LED's that are really bright and really small.
Mr. Burrows.
Got any pics of your car and what are you installing LED's or Neons?