The DTK-DL120 light pole surge protector from DITEK meets tough D.O.T. standards for outdoor lighting and provides 120VAC single phase protection. DITEK's DL Series of Light Pole surge arresters have been engineered to meet stringent D.O.T. standards to protect outdoor lighting. These series connected surge arresters provide optimum protection for high mast lights, highway lighting, standard street lights, and parking lot light poles.