Features: 1) The ballast in an HID lighting system generally has 2 purposes: provides proper starting voltage to strike and maintain arc, and can regulate proper current to the lamp once arc is established 2) Ballasts are not interchangeable among different types of HID lamps 3) A ballast design incorporates electronic circuitry to provide specific lamp and operating characteristics 4) Energy saving 5) High power factor 6) High reliability 7) No flicker 8) Option: various ballasts under 150W also available 9) Used for low watt HID bulbs 10) They provide the proper starting voltage to strike and maintain arc, and regulate the proper current to the lamp once arc is established 11) Input voltage: DC 8.5V - 12.8V, DC 10V - 15V, DC 9V - 16V 12) Input current: 1.0A, 1.9A, 3.2A 23) Output wattage: 10W, 21W, 24W, 35W, 50W