For
example, during sunrise as the light level in a room increases,
lighting fixtures in the room dim and shades close to maintain the
same, predetermined level of light. In the evening, lighting fixtures
automatically brighten to replace the light lost by the setting
sun.
The Vantage
LightPoint Sensor also behaves like a photocell turning lights on
or off at a preset level of light. In some cases (business signs,
outside security lights, corridors, etc.), lighting is desired during
overcast or cloudy conditions and not just at dusk or dawn. With
the Vantage LightPoint Sensor, an outdoor company sign that turns
on at dusk will also illuminate during heavy cloud cover. |