Home and Garden Are tail lights worth tinting? Is rear light tint illegal? Blacked-out tail lights are illegal in all 50 states. If you can't see anything through your tail lights, and you can't see your turn signal when it's turned on, your tinted tail lights are illegal. This is for safety purposes.Dec 31, 2019 Related Posts:Is it better to use tinted moisturizer or foundation?Why you shouldn't tint your windows?How do I fix my tail lights?Can paint be tinted white?