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Dimmer - WattStopper/Legrand - Facility Management Product Release


Dimmer: WattStopper/Legrand

WattStopper/Legrand
website | Company information


The LightSaver FD-301 fixture-mounted dimming photosensor dims 0-10 VDC ballasts in response to available daylight. Commissioning adjustments are made using a remote control once construction is complete, which eliminates the need for tools or ladders.

The spectral response of the FD-301’s photodiode is tuned to match the photopic curve; the light perceived by the human eye. A sliding setpoint algorithm allows the photosensor to compensate for the disparate spatial distribution of daylight and electric light.

By having two different setpoints for day and night, the target setpoint changes based on the current light level conditions. Together, these features result in a balanced contribution of electric light at all times that adjusts subtly.

The FD-301 also achieves lumen maintenance by holding target light levels as lamp output decreases over time. An optional occupant remote control permits the automatic lighting level to be temporarily overridden, if needed, without changing the setpoints.


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posted: 4/28/2008