Most of the front fascia on my truck is black, so it kinda bugged me that it has these big amber lenses on the front.
I had some spare credit on my PayPal account, so I got a 2' x 1' sheet of dark smoke lens vinyl from Metro Restyling's eBay store - $4.95 with free shipping.
A couple hours in the house, with some patience using the heat gun, gives great results.
I got impatient on the tails, so they didn't turn out as well as the front lenses.
I used up all the vinyl with very little waste, so I'd recommend getting a little extra in case your screw up.
The vinyl is non-permanent and easily removable, so I'm not stuck with this look if I change my mind.