Abstract: A system for locating an object in a volume of space can include a first electrical device disposed in the volume of space and having a first antenna and a first controller, where the first controller reduces a first default range of the first antenna to a first effective range. The system can also include an object disposed within the first effective range, where the first controller recognizes a first signal, using the first antenna, that identifies the object in the first effective range.

Abstract: A lighting fixture includes a light source that emits an illumination light and a receiver configured to receive a lighting control message from a photo sensor device. The lighting fixture further includes a lighting controller configured to adjust the illumination light based on the lighting control message. Adjusting the illumination light by the lighting controller includes changing a Correlated Color Temperature (CCT) of the illumination light.

Abstract: A lighting system having a main direct current (DC) voltage source and controllable lighting fixtures that each have a DC-DC current source. Each lighting fixture includes a DC voltage to current converter and an LED light source, and the DC voltage to current converter outputs a constant current from the DC voltage provided by a AC-to-DC converter. The output current of the DC voltage to current converter is independent of the total number of lighting fixtures in the lighting system and is controlled by injecting control commands to the DC voltage provided to DC-DC current source, wherein the AC power provided to the AC-to-DC converter is turned on and off to turn on and off the lights provided by the lighting fixtures of the lighting system and dimming and/or other lighting controls by injecting control commands into the DC voltage provided to the DC-DC current source.

Abstract: A lighting device, comprises a light source configured to provide a low Cyanosis Observation Index (COI) white light having a total flux, the light source comprising a first group of LEDs configured to provide a wide blue light, a second group of LEDs configured to provide a wide green light, and a third group of LEDs configured to provide a wide red light, wherein the low COI white light is a combination of at least the wide blue light, the wide green light, and the wide red light, wherein a current provided to the light source is distributed among the first group of LEDs, the second group of LEDs, and the third group of LEDs such that the wide blue light contributes 7 percent to 9 percent of the total flux, the wide green light contributes 62 percent to 76 percent of the total flux, and the wide red light contributes 20 percent to 26 percent of the total flux, and wherein a COI of the low COI white light is less than 1.

Abstract: A system can include an object having a communication device, where the communication device of the object broadcasts a first signal from a first location within a volume of space at a first time. The system can also include a first electrical device and a second electrical device that receives the first signal in the volume of space. The system can also include a controller communicably coupled to the first electrical device and the second electrical device, where the controller determines a first strength of the first signal received by the first receiver, determines a second strength of the first signal received by the second receiver, scales the first signal relative to the second signal based on the first strength and the second strength, and determines a location of the object in the volume of space based on scaling the first signal relative to the second signal.

Abstract: A lighting device, comprises a light source configured to provide a low Cyanosis Observation Index (COI) white light having a total flux, the light source comprising a first group of LEDs configured to provide a wide blue light, a second group of LEDs configured to provide a wide green light, and a third group of LEDs configured to provide a wide red light, wherein the low COI white light is a combination of at least the wide blue light, the wide green light, and the wide red light, wherein a current provided to the light source is distributed among the first group of LEDs, the second group of LEDs, and the third group of LEDs such that the wide blue light contributes 7 percent to 9 percent of the total flux, the wide green light contributes 62 percent to 76 percent of the total flux, and the wide red light contributes 20 percent to 26 percent of the total flux, and wherein a COI of the low COI white light is less than 1.

Abstract: A lighting fixture includes a light source that emits an illumination light and a receiver configured to receive a lighting control message from a photo sensor device. The lighting fixture further includes a lighting controller configured to adjust the illumination light based on the lighting control message. Adjusting the illumination light by the lighting controller includes changing a Correlated Color Temperature (CCT) of the illumination light.

Abstract: A lighting fixture includes a light source that emits an illumination light and a receiver configured to receive a lighting control message from a photo sensor device. The lighting fixture further includes a lighting controller configured to adjust the illumination light based on the lighting control message. Adjusting the illumination light by the lighting controller includes changing a Correlated Color Temperature (CCT) of the illumination light.

Abstract: A surge monitoring circuit for detecting transient spikes in an input voltage includes a voltage divider circuit that generates a divider output voltage from the input voltage, a reference voltage generator circuit that generates reference voltages, and a comparator circuit that generates comparator signals by comparing the divider output voltage to the reference voltages. The surge monitoring circuit further includes a processor configured to predict, at least based on the comparator signals, an expected failure of a surge suppressor circuit that suppresses the transient spikes, where the comparator signals indicate detections of divider output transient spikes in the divider output voltage. The divider output transient spikes correspond to transient spikes in the input voltage, where the divider output transient spikes have a higher voltage than the one or more reference voltages.

Abstract: A lighting device includes a first string of light emitting diodes (LEDs) configured to emit a warm white light having a warm Correlated Color Temperature (CCT). The lighting device further includes a second string of LEDs configured to emit a cool white light having a cool CCT. The lighting device also includes green light LEDs that emit a green light. A flux of the green light is controlled based on a flux of the cool white light or a flux of the warm white light. The flux of the warm white light and the flux of the cool white light change proportionally with respect to each other.

Abstract: A digital fencing system includes a first lighting fixture that includes a first communication module, and a second lighting fixture that includes a second communication module. The digital fencing system also includes a control device configured to receive first information from the first lighting fixture. The first information is related to a wireless signal transmitted by a mobile entity and received by the first lighting fixture. The control device is further configured to receive second information from the second lighting fixture. The second information is related to the wireless signal transmitted by the mobile entity and received by the second lighting fixture. The control device is also configured to transmit a control message to the mobile entity to control a movement of the mobile entity based on a location of the mobile entity with respected to a permitted area.

Abstract: A lighting device includes a first string of light emitting diodes (LEDs) configured to emit a warm white light having a warm Correlated Color Temperature (CCT). The lighting device further includes a second string of LEDs configured to emit a cool white light having a cool CCT. The lighting device also includes green light LEDs that emit a green light. A flux of the green light is controlled based on a flux of the cool white light or a flux of the warm white light. The flux of the warm white light and the flux of the cool white light change proportionally with respect to each other.

Abstract: A lighting device includes a light source that emits an illumination light. The light source includes a first group of light emitting diodes (LEDs) to emit a first light, a second group of LEDs to emit a second light, and a third group of LEDs to emit a third light. The second light is warmer light than the first light, and the third light is cooler light than the first light. The lighting device further includes a first difference amplifier that controls a first current flow through the second group of LEDs at least based on a magnitude of a current flowing through the light source. The lighting device also includes a second difference amplifier that controls a second current flow through the third group of LEDs at least based on the magnitude of the current flowing through the light source.

Abstract: A lighting device includes a light source that emits an illumination light. The light source includes a first group of light emitting diodes (LEDs) to emit a first light, a second group of LEDs to emit a second light, and a third group of LEDs to emit a third light. The second light is warmer light than the first light, and the third light is cooler light than the first light. The lighting device further includes a first difference amplifier that controls a first current flow through the second group of LEDs at least based on a magnitude of a current flowing through the light source. The lighting device also includes a second difference amplifier that controls a second current flow through the third group of LEDs at least based on the magnitude of the current flowing through the light source.

Abstract: A lighting fixture includes a light source that emits an illumination light and a receiver configured to receive a lighting control message from a photo sensor device. The lighting fixture further includes a lighting controller configured to adjust the illumination light based on the lighting control message. Adjusting the illumination light by the lighting controller includes changing a Correlated Color Temperature (CCT) of the illumination light.

Abstract: A system can include an object having a communication device, where the communication device of the object broadcasts a first signal from a first location within a volume of space at a first time. The system can also include a first electrical device and a second electrical device that receives the first signal in the volume of space. The system can also include a controller communicably coupled to the first electrical device and the second electrical device, where the controller determines a first strength of the first signal received by the first receiver, determines a second strength of the first signal received by the second receiver, scales the first signal relative to the second signal based on the first strength and the second strength, and determines a location of the object in the volume of space based on scaling the first signal relative to the second signal.

Abstract: A system for locating an object in a volume of space can include a first electrical device disposed in the volume of space and having a first antenna and a first controller, where the first controller reduces a first default range of the first antenna to a first effective range. The system can also include an object disposed within the first effective range, where the first controller recognizes a first signal, using the first antenna, that identifies the object in the first effective range.

Abstract: A lighting device includes a light source that emits an illumination light. The light source includes a first group of light emitting diodes (LEDs) to emit a first light, a second group of LEDs to emit a second light, and a third group of LEDs to emit a third light. The second light is warmer light than the first light, and the third light is cooler light than the first light. The lighting device further includes a first difference amplifier that controls a first current flow through the second group of LEDs at least based on a magnitude of a current flowing through the light source. The lighting device also includes a second difference amplifier that controls a second current flow through the third group of LEDs at least based on the magnitude of the current flowing through the light source.

Abstract: A driver of a lighting fixture includes a power circuitry configured to provide a first current to a first string of light emitting diodes (LEDs), a second current to a second string of LEDs, and a third current to a third string of LEDs that emit a third white light. The driver further includes a controller that controls the power circuitry to change an amount of the first current, an amount of the second current, and an amount of the third current to adjust a CCT of an output light provided by a lighting fixture. The output light includes two white lights from among the first white light, the second white light, and the third white light, where the first current, the second current, and the third current are adjustable independent of each other.

Abstract: A lighting device includes a ferroresonant transformer that receives an alternating current (AC) power signal and outputs an output power signal. The lighting device further includes a rectifier coupled to the ferroresonant transformer. The rectifier rectifies the output power signal from the ferroresonant transformer and generates a rectified power signal. The lighting device also includes a dc-to-dc converter coupled to the rectifier, wherein the dc-to-dc converter receives the rectified power signal and generates a regulated power signal.