Powerful, reliable and efficient, these are the most compact ballast units available today. Fitted with full safety features for total peace of mind, they're fully encapsulated within an injection moulded resin case to ensures smooth and virtually silent running. The encapsulated choke has a thermal cut out device which protects against lamp rectification and shorts – a safety feature that protects from shorts or fires. The igniter is timed to protect against lamp failure and the unit is wall mountable. The unit will run both sodium and metal halide lamps. Available as a 250w unit, 600w and 1000w.