Method for calibrating a lighting control system that facilitates daylight harvesting
First Claim
1. A method for calibrating a lighting system that facilitates daylight-harvesting, which involves combining the output of the lighting system with daylight and/or other light sources to reduce energy usage while providing lighting for an area, where the lighting system includes multi-level lighting capabilities for one or more light sources, the method comprising:
- measuring the light levels for the area when the lighting system is turned on at a high energy-level, is turned on at an intermediate energy-level, and is turned off;
determining from the measured light levels the light output of the lighting system for the different energy-levels;
measuring a present light level for the area; and
adjusting the light output of the lighting system based on a lighting control parameter, the light output of the lighting system, and the present light level for the area.
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Accused Products
Abstract
One embodiment of the present invention provides a system for calibrating a lighting control system. The lighting control system is a daylight-harvesting system that controls the output of the lighting system based on available daylight and/or other light sources to reduce energy usage while providing lighting for an area. The lighting system includes multi-level lighting capabilities for one or more light sources. First, the system measures the light levels for the area when the lighting system: is turned on at a high energy-level; is turned on at an intermediate energy-level; and is turned off. The system determines from these measured light levels the light output of the lighting system in the different states. Then, during operation, the system measures a present light level for the area. The system then adjusts the light output of the lighting system for the area based on a lighting control parameter (e.g an on set-point and an off set-point pair), the present light output of the lighting system, and the present light level for the area.
114 Citations
20 Claims
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1. A method for calibrating a lighting system that facilitates daylight-harvesting, which involves combining the output of the lighting system with daylight and/or other light sources to reduce energy usage while providing lighting for an area, where the lighting system includes multi-level lighting capabilities for one or more light sources, the method comprising:
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measuring the light levels for the area when the lighting system is turned on at a high energy-level, is turned on at an intermediate energy-level, and is turned off;
determining from the measured light levels the light output of the lighting system for the different energy-levels;
measuring a present light level for the area; and
adjusting the light output of the lighting system based on a lighting control parameter, the light output of the lighting system, and the present light level for the area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An apparatus that calibrates a lighting system to facilitate daylight-harvesting, which involves combining the output of the lighting system with daylight and/or other light sources to reduce energy usage while providing a lighting for an area, where the lighting system includes multi-level lighting capabilities for one or more light sources, comprising:
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a measurement mechanism configured to measure the light levels for the area when the lighting system is at a high energy-level, is at an intermediate energy-level, and is turned off;
a determining mechanism configured to determine from the measured light levels the light output of the lighting system for the different energy-levels;
wherein the measurement mechanism is further configured to measure a present light level for the area; and
an adjustment mechanism configured to adjust the light output of the lighting system based on a lighting control parameter, the light output of the lighting system, and the present light level for the area.
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Specification