A system for powering an excimer bulb includes a first inductor configured to be coupled to a first terminal of the excimer bulb. The system further includes a first transistor coupled to the first inductor and having an on state configured to allow current to flow through the first inductor and an off state. The system further includes a second transistor configured to be coupled to the first terminal of the excimer bulb and having an on state configured to allow current to flow through the excimer bulb and an off state. The system further includes a controller coupled to the first transistor and the second transistor, and to control operation of the first transistor and the second transistor to power the excimer bulb.

An LED light fixture includes a housing, a controller circuit having direct current (DC) and alternating-current (AC) power inputs, a direct-current (DC) power supply unit (PSU) connected to the controller circuit, an alternating-current (AC) PSU connected to the controller circuit, and at least two groups of light emitting diodes (LEDs) operable to emit light, wherein each group includes at least one LED of a first type and at least one LED of a second type. In some embodiments, when the LED light fixture operates in a security mode the controller prevents power from flowing to the AC PSU and allows power to flow to the DC PSU to power only the first type of LEDs of the at least two groups of LEDs to emit a security light.

A system for powering an excimer bulb includes a first inductor configured to be coupled to a first terminal of the excimer bulb. The system further includes a first transistor coupled to the first inductor and having an on state configured to allow current to flow through the first inductor and an off state. The system further includes a second transistor configured to be coupled to the first terminal of the excimer bulb and having an on state configured to allow current to flow through the excimer bulb and an off state. The system further includes a controller coupled to the first transistor and the second transistor, and to control operation of the first transistor and the second transistor to power the excimer bulb.

A system for powering an excimer bulb includes a first inductor configured to be coupled to a first terminal of the excimer bulb. The system further includes a first transistor coupled to the first inductor and having an on state configured to allow current to flow through the first inductor and an off state. The system further includes a second transistor configured to be coupled to the first terminal of the excimer bulb and having an on state configured to allow current to flow through the excimer bulb and an off state. The system further includes a controller coupled to the first transistor and the second transistor, and to control operation of the first transistor and the second transistor to power the excimer bulb.

A detector for a chromatograph includes a light source, and a light detector that detects light generated based on turning on of the light source, wherein the light source includes a deuterium lamp, and a deuterium lamp power supply circuit connected to the deuterium lamp, and the deuterium lamp power supply circuit includes a DC voltage generation circuit that generates a DC voltage by performing a switching operation, a rectifying operation and a smoothing operation, a voltage application circuit that applies a DC voltage generated by the DC voltage generation circuit to the deuterium lamp, a first feedback circuit that feeds a first feedback voltage changing depending on a DC voltage to the DC voltage generation circuit such that the DC voltage generated by the DC voltage generation circuit becomes close to a discharge maintaining voltage, after electric discharge of the deuterium lamp is started, and a constant current control circuit that controls a discharge current of the deuterium lamp to be constant.

Photographic lighting devices, systems, and methods having a plurality of electrical energy storage/discharge (EESD) elements and/or one or more light sources in a single photographic lighting device to perform one or more photographic lighting effects. EESD elements and one or more light sources can be configured to have multiple separate light emissions occur in a single image acquisition window. The multiple light emissions are separated in an image acquisition window by a time period that is about shutter speed exposure time/(N1), where N is the number of light emissions. In one such example, two light emissions are separated by a time period that is about shutter speed exposure time/(N1).

Photographic lighting devices, systems, and methods having a plurality of electrical energy storage/discharge (EESD) elements and/or one or more light sources in a single photographic lighting device to perform one or more photographic lighting effects. EESD elements and one or more light sources can be configured to have multiple separate light emissions occur in a single image acquisition window. The multiple light emissions are separated in an image acquisition window by a time period that is about shutter speed exposure time/(N1), where N is the number of light emissions. In one such example, two light emissions are separated by a time period that is about shutter speed exposure time/(N1).

Disclosed is a dual phase, multi-frequency, electromagnetic generator that creates electromagnetic fields having a first phase on a first side of said electromagnetic generator and electromagnetic fields having a second phase on an opposite side of said electromagnetic generator. In addition, gaseous emission tubes generate light frequency signals on each side of the electromagnetic generator. Tesla coils are disposed at least partially within the cone of a conically shaped transmission coil to achieve a high degree of coupling between the conically shaped transmission coils and the Tesla coils. Sparks gaps are used to create a fast rise time signal, which creates multiple frequencies.

Disclosed is a dual phase, multi-frequency, electromagnetic generator that creates electromagnetic fields having a first phase on a first side of said electromagnetic generator and electromagnetic fields having a second phase on an opposite side of said electromagnetic generator. In addition, gaseous emission tubes generate light frequency signals on each side of the electromagnetic generator. Tesla coils are disposed at least partially within the cone of a conically shaped transmission coil to achieve a high degree of coupling between the conically shaped transmission coils and the Tesla coils. Sparks gaps are used to create a fast rise time signal, which creates multiple frequencies.

A load control device (e.g., an LED driver) for controlling the intensity of a lighting load (e.g., an LED light source) may provide a wide output range and flicker-free adjustment of the intensity of the lighting load. The load control device may comprise a load regulation circuit, a control circuit, and a filter circuit (e.g., a boxcar filter circuit) that operates in a different manner in dependence upon a target current. When the intensity of the lighting load is near a low-end intensity, the control circuit may adjust an operating frequency of the load regulation circuit in response to the target current, and may control the filter circuit to filter a current feedback signal during a filter window that repeats on periodic basis. When the intensity of the lighting load is near a high-end intensity, the control circuit may control the filter circuit to constantly filter the current feedback signal.