Ok, I admit that about 5 years ago I had neon lights on my car. I have to admit that if done right it can actually look very nice on SOME cars. Not just any car, but if you have a mean looking car, it's the perfect addition.
http://www.amazon.com/gp/search?search-alias=automotive&field-keywords=StreetGlow
There are some of the things you can buy. I think a lot of it is stupid, but the underbody lights and tube lights can look really nice if done right.

http://www.amazon.com/gp/search?search-alias=automotive&field-keywords=StreetGlow
There are some of the things you can buy. I think a lot of it is stupid, but the underbody lights and tube lights can look really nice if done right.