It's true that you're not supposed to add lights to your vehicle if it didn't come stock (or some trim of the same model) with lights. You'd have to run afoul of someone with a real hard on to get a ticket, if noticed at all.
Wanna be extra careful? Stay away from blue. Turns some heads.
Sorry for the late response; been away for awhile.
Trust me....don't give the cops any reason to pull you over. Neon lights under your truck attracts a lot of attention. At a minimum put a switch on it, and turn it off when you leave the school parking lot.