I hate to say this but I did mine in on a dark road at night with a flashlight and touch. That should give you an idea on how hard it is to do. You will feel then seat when they go in. if you turn on your lights and you cant see that far they are not correct. When pointed at the wall the should have a line on the top with a kind of bend in the middle. If you do a search for the lights there is a design in a thread that shows this.

Or Give me the 80 bucks that would work out to 320.00 and hour becuase it takes about 15 min. :-)