Keep in mind if you get rear-ended with these dark tinted covers the liablity can fall back on you.
Last fall a woman rear-ended a ricer on the 101 and it was noted in the police report that she could not see the brake lights. The cop made note in the report of the dark tinted covers and after going thru the court process, the ricer was at fault.
If you search thru AZCentral you might still find the story
I tinted mine myself. I went to space age paint supply and told them what I was doing and they set me up with a black candy paint, and a good clear coat for less then $25. I only made mine a touch darker to take the brightness out of them and then I use a black reflector and untinted lenses for my corner lights.