Hello everyone and thanks for the replies.
Yes i plan on putting them on my benz
They come in blue, red, green, purple and a new multicolor one that changes as you drive. Unfortunatly i spent over $150.00 for one of each color and then i found about about the new "multi color" ones.
You can get them on ebay or jcwhitney, they come 2 in a pack, so you need 2 packs for a car. They cost between 12-20 per pack.
http://www.tireflys.com/default.html
this is there company website. let me know what you guys think