Abstract: A distributed occupancy detection system includes plural networked node devices configured to be spatially distributed throughout a structure. Each node device includes an occupancy sensor that senses a presence characteristic indicative of an object being in a monitored area of the structure that is associated with the occupancy sensor. Each node device also includes one or more processors that determine a probability that the object is or was located in the structure based on the presence characteristic sensed by the occupancy sensor of a first node device and based on the presence characteristic sensed by the occupancy sensor of one or more neighboring node devices. The one or more processors determine whether the object is in the structure based on the probability.

Abstract: Provided are systems, methods, and computer-readable storage media for improving accuracy of GPS in luminaires. For example, in one embodiment, there is provided a method that includes receiving, at a controller coupled to a luminaire, a GPS message. The method further includes extracting information from the GPS message, the information including data associated with a plurality of coordinates. Furthermore, the method can include determining, based on the information and not from the coordinates, an error associated with each coordinate of the plurality of coordinates. The method can also include discarding coordinates for which the error fails to satisfy a predetermined condition. Moreover, the method can include selecting, as a location of the luminaire, the coordinates for which the error satisfies the predetermined condition.

Abstract: A population of coated phosphor particles is presented. Each coated phosphor particle has a core including a Mn4+ doped phosphor and a shell including aluminum oxide, titanium oxide, zirconium oxide, zinc oxide, tin oxide, silicon dioxide, hafnium oxide, indium oxide, indium tin oxide, potassium fluoride, titanium nitride, boron nitride, silicon nitride, a polymer material, or a combination thereof. A process for preparing the population of coated phosphor particles is also presented.

Abstract: Provided is a method and a remote diagnostic system that can be used for signage applications that includes a plurality of LED-based signs, each having one or more corresponding LED signage drivers, one or more controllers for real-time monitoring and controlling the LEDs in the LED-based signs, a commissioning application (“app”) for commissioning, the one or more controllers, an information system or cloud network for storing information received from and sending commands to, the one or more controllers related to the LED-based signs, and at least one sensor.

Abstract: There are provided systems, apparatuses, and methods for controlling power delivery from an auxiliary power supply. For example, there is provided a method that includes generating a first random number to define a timeout period. During the timeout period, the method may detect whether a voltage is present at an output of an auxiliary power supply, may disable the auxiliary power supply when the voltage is detected at the output, and may enable the auxiliary power supply when the voltage is not detected at the output.

Abstract: A networked light control system includes a wireless detection circuit configured to receive wireless signals emitted by marker devices associated with different lighting devices. The control system includes the lighting devices connected with each other in a wired lighting control network. The control system includes a controller configured to determine network addresses of the lighting devices in the wired lighting control network based on the wireless signals received from the marker devices. The control system includes the controller is configured to control operation of one or more of the lighting devices in the wired lighting control network using one or more of the network addresses that are determined based on the wireless signals received from the marker devices.

Abstract: A single-stage driver for an LED device, configured to be coupled between a power supply and the LED device, comprises: a rectifier, a DC-to-DC converter, a resistor and a controller. The rectifier is configured to be coupled to the power supply and convert an alternating voltage from the power supply into a first direct voltage. The DC-to-DC converter, which comprises at least two switches, is coupled between the rectifier and the LED device and configured to receive the first direct voltage and provide a constant current to the LED device. The resistor is configured to be coupled in series with the LED device. The controller is coupled between the resistor and the at least two switches, and configured to keep the current through the LED device stable around a predetermined current value by controlling the switches based on a voltage across the resistor, wherein all the at least two switches are turned on or off synchronously.

Abstract: A general illumination lighting system and/or at least one targeted surface illumination lighting system. The general illumination lighting system including a general illuminating light source configured to generate light toward one or more surfaces or materials to inactivate one or more pathogens on the one or more surfaces or materials. The at least one targeted surface illumination lighting system including one or more targeted surface illuminating light sources that are integrated into or coupled to a plurality of devices, equipment, or fixtures. The one or more targeted surface illuminating light sources configured to generate targeted light toward one or more surfaces of the devices, equipment, or fixtures to inactivate one or more pathogens on the one or more surfaces. The light from the general illuminating light source and the one or more targeted surface illuminating light source including an inactivating portion having wavelengths in a range of 280 to 380 nanometers.

Abstract: An LED lamp protection circuit comprising: a driving circuit, a rectifier circuit coupled with the driving circuit, an LED luminous component circuit coupled with the rectifier circuit, and an arcing protection circuit coupled between the rectifier circuit and the LED luminous component circuit. The arcing protection circuit and the LED luminous component circuit are connected in parallel. When the LED lamp works under a normal condition, the arcing protection circuit is in blocking state. When at least one circuit between the rectifier circuit and the LED luminous component circuit opens, the arcing protection circuit is turned on, the driving circuit and the arcing protection circuit form a loop circuit to extinguish arc.

Abstract: Synthesizing a color stable Mn4+ doped phosphor by contacting a gaseous fluorine-containing oxidizing agent with a precursor of: AaBbCcDdXx:Mn4+; AaiBbiCciDdXxYd:Mn4+; A13G2?m?nMnmMgnLi3F12Op; or AZF4:Mn4+. Where A is Li, Na, K, Rb, Cs, or a combination; B is Be, Mg, Ca, Sr, Ba, or a combination; C is Sc, Y, B, Al, Ga, In, Tl, or a combination; D is Ti, Zr, Hf, Rf, Si, Ge, Sn, Pb, or a combination; X is F or a combination of F and one of Br, Cl, and I; Y is O, or a combination of O and one of S and Se; A1 is Na or K, or a combination; G is Al, B, Sc, Fe, Cr, Ti, In, or a combination; Z is La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sc, Y, In, or a combination.

Abstract: Provided is a method and an apparatus for installing and replacing a lighting controller of an outdoor lighting fixture that includes a base portion supplying power, a telescopic stick portion attached to the base portion at a first end thereof, an extension stick portion attached to a second end of the telescopic stick portion, and a drone-type device attached to the extension stick portion at an end opposite telescopic stick portion. The drone-type device receives power from the base portion through the telescopic stick portion and travels over and land at a top surface of the outdoor lighting fixture and perform installation or replacement of the lighting controller.

Abstract: A retrofit kit for a luminaire including a door configured to sit below a ceiling plane of the luminaire.

Abstract: A process for synthesizing a manganese doped phosphor of formula I: Ax [MFy]:Mn4+ is presented. The process includes contacting a first solution with a second solution and a third solution in the presence of a plurality of inert particles. The first solution and the second solution include a composition of formula II: Ax[MnFy]. The third solution includes a source of M, where A is Li, Na, K, Rb, Cs, or combinations thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or combinations thereof; x is an absolute value of a charge of the [MFy] ion; and y is 5, 6 or 7.

Abstract: A lighting system includes a light source configured to generate light to inactivate one or more pathogens. The light includes an inactivating portion having wavelengths in a range of 280 to 380 nanometers.

Abstract: A method includes obtaining a potassium hexafluorosilicate (PFS)-based powder, obtaining a fluidization material, and mixing the PFS-based powder with the fluidization material to form a PFS-based mixture. The PFS-based mixture is configured to be mixed with a resinous material to form a flowing phosphor blend configured to be placed onto a light source to form a phosphor on the light source.

Abstract: Heavily phosphor loaded LED packages having higher stability and a method for increasing the stability of heavily phosphor loaded LED packages. The silicone content of the packages is increased by decreasing the amount of one phosphor of the blend or by increasing the thickness of the silicone phosphor blend layer.

Abstract: A method includes mixing a first fluoride phosphor powder that is doped with tetravalent manganese with a treatment solution for a designated period of time, stopping the mixing to allow the fluoride phosphor powder to settle, removing at least some liquid that has separated from the first fluoride phosphor powder, repeating (a) the mixing, (b) the stopping of the mixing, and (c) removing at least some of the liquid during one or more additional cycles, and obtaining a second fluoride phosphor powder following the repeating of the mixing, the stopping of the mixing, and the removing of at least some of the liquid. The second fluoride phosphor powder includes a reduced amount of the manganese relative to the first fluoride phosphor powder.

Abstract: An apparatus, method, and system, the apparatus including a housing; a light source, disposed in the housing, including at least one source of illumination; a radio frequency (RF) transmitter located on or in the housing; and at least one directional radiating element at least partially enclosed by the housing and coupled to RF transmitter, the at least one directional radiating element directing a RF signal transmitted by the RF transmitter in a predetermined direction away from the housing.

Abstract: Example apparatus, systems and methods to communicate between a control agent and an edge device via a cloud broker are disclosed and described herein. An example apparatus includes a processor configured to receive a first instruction from a first control agent for an edge device, the first instruction associated with a first schedule of settings for a target, the target accessible via an edge device. The example processor is configured to analyze the first instruction to identify a conflict between the first instruction and a second instruction, the second instruction associated with a second control agent. When no conflict is identified, the example processor is configured to provide the first instruction to the edge device for relay to the target. When a conflict is identified between the first instruction and the second instruction, the example processor is configured to mediate the conflict and provide an outcome to the edge device.

Abstract: Provided is a lighting subassembly that includes a printed circuit board having one or more lighting elements thereon and a single through-hole at a center region thereof for air flow, a lens to cover the one or more lighting elements, and an overmold body covering the lighting assembly. The overmold body secures the lens in place and covers a back surface of the printed circuit board opposite the one or more lighting elements and includes a plurality of through-holes corresponding to the through-hole of the printed circuit board. A vent is also included in the lighting subassembly and is disposed adjacent to the through-hole of the printed circuit board in between the overmold body and the printed circuit board, configured to only allow air to flow therethrough such that the through-holes and the vent together create a venting system to allow airflow through the lighting subassembly.