Eeeey guys

I have been seeing some people with different color Halo Projectors (Green, Red, Blue) in my town.

I think it looks pretty cool and wanted to get the green for my my truck but I don't know where or how they did it.

I googled and forum searched and came up with nothing.

Do you guys know how or where to get these projectors?
Are they regular projectors (anzo, spider, recon) with different color led's (mod?)?
Are they just led's wrapped around the light?

I have no idea.