Deluxe cord lights are intended for severe environments and are impervious to dust, dirt, chemical vapors, salt spray and other corrosive elements. Constructed of heavy duty 14/2, 14/3 or 12/3 SJTW round cord with a 75 deg C (167 deg F) temperature rating, deluxe cord lights are UL listed and complies with UL standard 1088 for temporary lighting strings.