Ballasts for discharging bulps with higher power are used mainly for lighting inindustrial buildings and warehouses, street lighting, illuminating of sportsfacilities and industrial greenhouses.Up to now these bulps are electrically driven with conventional magnetic ballasts primarily, which allow only one operating condition with a highown consumption of energy. Thus the used energy is about 120% of the nominalpower from the used bulp. 

With an high-frequency electronic ballast it is possible to drive a bulpmore efficient and the lightoutput can be varied +/- 20%. The energyconsumption of a lamp fixture with the same light output is nearby 105% ofthe nominal output of the bulp, so 15% of the energy is saved. The gentleoperation of the bulp – in particular until ignition - extends the averagedurability and the preservation of the luminous flux. This usually reducesthe maintenance effort by 50%. 

The use of modern semiconductors reduces the weight of a lamp ballast by80-90%, and effects long-term a saving of natural resources. The installationof lighting fixtures will be much easier and the structure of buildings can bedesigned for less bearing load.