Abstract: A lighting fixture system, comprising a first illuminant, a secondary illuminant; and a sensor configured to detect a predetermined condition, the sensor being coupled to the first illuminant and the secondary illuminant, the first illuminant and the secondary illuminant comprising different light sources, the sensor configured to cause modulation of the first illuminant and the secondary illuminant in response to detection of the pre-determined condition.

Abstract: A lighting fixture system, comprising a first illuminant, a secondary illuminant; and a sensor configured to detect a predetermined condition, the sensor being coupled to the first illuminant and the secondary illuminant, the first illuminant and the secondary illuminant comprising different light sources, the sensor configured to cause modulation of the first illuminant and the secondary illuminant in response to detection of the pre-determined condition.

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.

Abstract: One embodiment of the present invention provides a system for preventing incorrect lighting changes in a daylight-harvesting system, which controls the output of a lighting system based on the presence of daylight and/or other light sources to reduce energy usage. During operation, the system measures a first light level using a first sensor. Next, the system measures a second light level for a different field-of-view using a second sensor. When the system detects through the first sensor a change in the first light level, the system determines from the second sensor whether the second light level has also changed. If the first sensor and the second sensor both detect a change (in the same direction) in the measured light levels, the system adjusts the light output of the lighting system to maintain target light levels for the area.

Abstract: A photosensor with customizable angular-response characteristics is presented. This photosensor includes a light-modifier located between the photosensor and a target area to be monitored by the photosensor, wherein the light-modifier provides a customizable angular response for light received at the photosensor from the target area.

Abstract: A photosensor with customizable angular-response characteristics is presented. This photosensor includes a light-modifier located between the photosensor and a target area to be monitored by the photosensor, wherein the light-modifier provides a customizable angular response for light received at the photosensor from the target area.

Abstract: One embodiment of the present invention provides a system that uses power-line phase-cut signaling to change energy usage for one or more devices that share a common power signal. During operation, the system receives a request to change power usage. In response to the request, the system inserts a phase-cut notch into the common power signal. A device that is located downstream from the inserted phase-cut notch detects this notch in the common power signal, and in response triggers a power-state change. For instance, the device may trigger a reduced-power state when it detects a phase-cut notch.

Abstract: One embodiment of the present invention provides a system for preventing incorrect lighting changes in a daylight-harvesting system, which controls the output of a lighting system based on the presence of daylight and/or other light sources to reduce energy usage. During operation, the system measures a first light level using a first sensor. Next, the system measures a second light level for a different field-of-view using a second sensor. When the system detects through the first sensor a change in the first light level, the system determines from the second sensor whether the second light level has also changed. If the first sensor and the second sensor both detect a change (in the same direction) in the measured light levels, the system adjusts the light output of the lighting system to maintain target light levels for the area.

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.