I've never used them myself but from what I've read any "blackout" treatment to a stock light will reduce output. The stock lights already suck for light output even when clear. As far as getting pulled over, I doubt it. Will they leak? Maybe. Depends on how well they are sealed. When I got new headlights and corners I ran a bead of clear silicone around all of them before I installed them since I know they all leak eventually. So far, no issues. Just my .02.
Honestly when I get new lights I'll be getting retros by Classy Pontiac and calling it a day. Will likely be the last set I'll ever need and be properly built.
