A ballast is always necessary for the operation of high pressure sodium lights (HPS) or metal halide lamps (MH). The selection of the right ballast is..
Electromagnetic ballast mounted on a steel plate prepared to start HPS and MH lamps. Very good finishing, provided with suitable clamps and terminals ..
The end of temperature problemsAlmost everyone who uses sodium discharge lamps for growing has had problems with the grow room getting too hot during ..