| 摘要 |
A system wherein a control panel is used to set brightness, select an operation sensor (occupancy or light level), and provide a selection of lights off or reduced light for night conditions. A sensor control mode or a manual control mode may be selected. A sensor module comprises an occupancy sensor and light sensor used to monitor the ambient light at predetermined intervals Absent interrupts from the control panel, the sensor module or the control module, the system is idle. Whenever the system is in an on state, light from light fixtures is adjusted to compliment daylight to produce the user set brightness, thus reducing energy consumption. In an active mode, at least some light remains on, instead of powering off, during periods of system off. A delay timer provides time until the light is reduced or turned off entirely.
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