I can answer that....clean the area under the lamp with some alcohol. spray the area with quick detailer or a solution of soapy water. peel the vinyl away from its backing and spray the back of the vinyl. Position the vinyl where you want it and then squeegy the water out with a squeegee, your finger or anything flat. Very easy...anyone can do this! Just make sure the vinyl is in the position you want before squeegee. Then let dry or hit with a hairdryer on low heat to set the adhesive. its just 3m vinyl.
Thanks for the reply...but I'm not sure we are talking about the same product. I'm talking about the black ops headlight liners, that appear to be installed inside the headlight housing...making me think the headlight housing would need to be opened up. Perhaps I'm wrong, but they dont look like they're as simple as 3m vinyl.