Abstract: An airfield lighting system includes an approach lighting subsystem and a runway lighting subsystem. A power supply/controller is configured to provide electrical power to the approach lighting subsystem and the runway lighting subsystem. The power supply/controller is further configured to control operation of the approach lighting subsystem and the runway lighting subsystem. A set of electrical wiring connects the approach lighting subsystem and the runway lighting subsystem to the power supply/controller. The power supply/controller communicates with the approach lighting subsystem and the runway lighting subsystem through the electrical wiring.

Abstract: The present disclosure relates to precision approach path indicator (PAPI) systems. An example system includes a heatsink assembly and a plurality of optical channels. Each optical channel of the plurality of optical channels includes a light emitting diode (LED) source coupled to a first surface of the heatsink assembly. Each optical channel also includes a back collimating lens coupled to a second surface of the heatsink assembly. The LED source is configured to emit light through the back collimating lens to provide collimated light. Each optical channel also includes an optical filter disposed to interact with a first portion of the collimated light to form filtered light. Each optical channel also includes a front collimating lens configured to interact with the filtered light and a second portion of the collimated light to form output light.

Abstract: Lightweight and man-portable lights may be used to provide a rapid and deployable aircraft landing zone illumination solution. The lights may produce a combination of visible and infrared (IR) light. The lights may be mounted using stakes or concrete anchors, or they can be left unmounted on the ground for easy and rapid deployment. The light may include five types of visible light-emitting diodes (LEDs)—white (W), yellow (Y), green (G), red (R), and blue (B)—and infrared (IR) LEDs. The LEDs (visible and IR) can be controllable between different intensities. The light may include built-in wireless communication capabilities. A number of lights may be positioned and then operated together for landing zone and emergency lighting solutions.

Abstract: An LED driver is provided. The LED driver has a constant current power source. In some embodiments, the constant current power source is an electrical input configured for connection to a source of power at a constant current. In some embodiments, the source of power is a constant current regulator. The LED driver also includes a switch electrically connected to the constant current power source. The switch has at least two outputs wherein the switch is configured to selectively connect the constant current power source to each of the at least two outputs. The switch is configured to connect each of the at least two outputs for a pre-determined period of time.

Abstract: An LED driver is provided. The LED driver has a constant current power source. In some embodiments, the constant current power source is an electrical input configured for connection to a source of power at a constant current. In some embodiments, the source of power is a constant current regulator. The LED driver also includes a switch electrically connected to the constant current power source. The switch has at least two outputs wherein the switch is configured to selectively connect the constant current power source to each of the at least two outputs. The switch is configured to connect each of the at least two outputs for a pre-determined period of time.

Abstract: An airfield guidance sign is provided. The airfield guidance sign has a housing with a display side. At least a portion of the display side is able to transmit light. For example, the display side may have a portion which is transparent or translucent. The airfield guidance sign includes an LED printed wiring assembly (“PWA”) mounted within the housing. The LED PWA has one or more LEDs configured to provide illumination to the display side of the housing. The illumination may be direct or indirect. The LEDs of the LED PWA are coated in an epoxy. For example, the LEDs may be coated in an optically-clear epoxy. In some embodiments, the entire LED PWA is coated in an epoxy. In some embodiments, portions of the LED PWA are coated in an epoxy that is not optically clear.

Abstract: Runway end identifier light system having a housing with an illumination window, a substrate having a mounting surface disposed within the housing, and a first light-emitting diode (“LED”) disposed on the mounting surface of the substrate. The LED may be configured such that light emitted by the LED is visible through the illumination window of the housing. The LED may have a primary illumination axis which is at an angle greater than 0° with respect to a perpendicular axis of the substrate. Systems with multiple mounting surfaces and multiple LEDs having various primary illumination axes are disclosed.

Abstract: Systems and methods are provided for measuring articles contained within and/or dispensed from a receptacle. The present invention incorporates a counter device that measures the displacement of a conductive target relative to an LC circuit using an inductance-to-digital converter. In operation, a change in weight of articles in a receptacle will displace or deform a conductive target relative to the position of the LC circuit and, as such, it will create a measurable differential relating to inductance. Based on the measured differential, the number of articles (e.g., pills) within and/or taken from the receptacle is determined using a processor. In accordance with a further aspect, the counter is configured to compensate for a temperature-dependent variation in the measured electrical parameter algorithmically using the processor and/or through the particular configuration of the receptacle components.

Abstract: Disclosed are elevated lights and methods of maintaining illumination in elevated lights for an airfield. The elevated lights have a substrate having a mounting surface, LEDs, a reflector, and an LED driver circuit. The LEDs are disposed on the mounting surface of the substrate and configured such that a primary illumination axis of each LED is oriented along a longitudinal axis of the elevated light. The reflector is configured such that the light emitted from the LEDs is reflected radially with respect to the longitudinal axis of the elevated light. The driver circuit is configured to provide a current to the LEDs and detect failure of one or more of the LEDs. Illumination is maintained by providing a current to the LEDs, detecting a voltage change across the LEDs, determining, based on the voltage change, LED failure, and altering the provided electrical current in order to maintain illumination.

Abstract: A facilities lighting system includes a power supply and an AC/DC converter in electrical communication with the power supply. A plurality of lighting fixtures is in electrical communication with one another in series wherein at least one of the plurality of lighting fixtures is in electrical communication with the AC/DC converter. At least one LED lighting member is installed in the at least one of the plurality of lighting fixtures. In one embodiment, the lighting member is an LED tubular bulb such as an LED T8 tube.