|
The lamp wattage can be reduced by operating the ballast at a higher impedance value, higher than the rated value. The lamp manufacturer´s specifications must be observed in doing so to avoid shortening the lamp´s service life. The lamps should be started at the ballast´s rated impedance and only switched down to reduced operation after a period of at least five minutes.
The impedance value can be altered by using an additional ballast (high-effort option) or by using a switchable ballast (low-cost option). These ballast models can be switched using either a modern, time-controlled electronic power reduction switch, which is equipped with an additional control conductor (230 V), or a power reduction switch with a constant incentive rate setting (no control conductor).
|
