Aspen Surgical System Ii Led Series. The System Two LED series presents an unmatched value to surgery centers and alternate care facilities seeking a surgical lighting system. The energy efficient design consumes half the electricity of its halogen counterpart to offer a significant long-term savings. The long-life 50,000 hour rated LED’s eliminate procedure room down-and are output rated at 120,000 Lux with a Kelvin color temperature of 4300°. The System Two LED series is designed with the unmatched MI arm system for optimal surgical site visibility and positioning. This lighting system is available in solo, duo and tri mounting styles.