Texas Transportation Code - TRANSP § 623.098. Caution Lights

(a) A manufactured house that is wider than 12 feet must have one rotating amber beacon of not less than eight inches mounted at the rear of the manufactured house on the roof or one flashing amber light mounted at each rear corner of the manufactured house approximately six feet above ground level.  In addition, the towing vehicle must have one rotating amber beacon of not less than eight inches mounted on top of the cab.

(b) Each beacon shall be operated during a move under a permit and while on a highway, road, or street in this state.