The UL-1571 Listed Series MSL-HI-LED utilizes the most advanced high intensity LED technology available. The Series MSL-HI-LED "Light Engine" was developed specifically designed for the PAPAILIAS Co. to offer the same brilliant illumination as a 100 watt Halogen Lamp and it is not a simple off the counter LED lamp. The MSL-HI-LED Series by PAPAILIAS Co. also features a heavy wall T304 SST housing and gasketed joints - making the MSL-HI-LED the brightest, longest lasting, heavy duty, corrosion resistant UL Listed light Fixture we ever offered. 110/120 V input voltage.