This article is from the Toyota Tundra FAQ, by Steve Yee with numerous contributions by others.
In general: It's not recommended for daily driving use. Many municipalities
have ordinances on the books that restrict the use of any lamp cover that is
not the OEM issued cover.
In regards to tail and side lamps: If you do replace the tail and side lamp
covers with clear covers, and utilize colored bulbs, this would probably pass
most ordinances. Check with your local law enforcement agency.
In regards to headlights: Never put any sort of overlay that restricts or
reduces the output of the headlamp. Exceptions to this rule are covers such as
ones made by X-Pel and 3M (which are clear), and usage of smoke colored
overlays for show usage.
For those of you who use clear covers for show usage, Project Import has them
available for the Tundra. It is not on their online catalog, but you can go to
their website and order them for around $60. Project Import is located at