Tex. Transportation Code § 547.332: OTHER LAMPS PERMITTED.

A motor vehicle may be equipped with:

(1) not more than two side cowl or fender lamps that emit an amber or white light without glare;

(2) not more than two running board courtesy lamps, one on each side of the vehicle, that emit an amber or white light without glare; and

(3) one or more backup lamps that:

(A) emit an amber or white light only when the vehicle is not moving forward; and

(B) may be displayed separately or in combination with another lamp.

Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.