Luxstat Day/Night Control... Links :: News Careers :: Events Daylight Harvesting Controls KEY FEATURES Open Loop ON/OFF daylight harvesting control Integrated clock for night... blocking Pushbutton programming DIN rail mounting UL Listed 2-Year Warranty OVERVIEW The Luxstat Day/Night Control Module by Servodan provides single zone ON/OFF daylight harvesting... control utilizing a unique Open Loop control algorithm. In the evening, when daylight diminishes below the desired ON set point, the control module switches lighting on. In...