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Technical
New
technology can now simply set the light levels to the standard
or nominal
levels , which will reduce lighting costs by up to 30% and provide
significant energy savings.
Reducing the voltage on
discharge lamps to 207V in turn reduces
the current drawn by the lamp, and so the resultant power consumed by
it. Many people mistakenly assume that because a lamp has say, 400Watts
stamped on it, that the power of the lamp is a constant. It is the
resistance that is the constant, and the power rating of the lamp is
determined by the lamp manufacturer, based on its rated voltage, i.e.
230V +/- 10 %. The higher the voltage applied to the lamp, the higher
its power rating and vice-versa.
To
utilise this beneficial feature of discharge lamps the Opt-i-Mizer
and fluoresave controllers reduce the voltage, after a start up period
and by a step reduction of a pre-determined
amount (factory set). The step voltage reduction is achieved in a
way such that the
supply sine wave is maintained at a reduced mean level without any
chopping of the voltage to the lamps and accordingly no additional
harmonic distortion or noise is introduced. This is also achieved
without any interruption or break at the switching point.
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