The present disclosure relates to a flash generator for providing power supply to a flash tube so that the flash tube rapidly provides a light output adapted to FP-sync, Flat Peak. The flash generator comprises a capacitor bank, an output and a switch configured to switch a current flow from the capacitor bank via the output to provide a variable power via the output. The flash generator further comprises a controller for controlling the switch, whereby by controlling the on time of the switch, the generator is operative to provide, during a time period of 100 to 2000 μs during a peak time period within the time period, an average power at least 4 times higher than the average power provided during the other time period within the time period, whereby the flash tube during the peak time period becomes fully ignited.

A light tube with anti-electric shock protection function and capable of being supplied with electricity by electrical ballast and alternate-current power supply in working frequency includes two conductive pin assemblies, a bridge rectifier, an anti-electric shock detection control circuit, a direct-current filtering circuit, a bleeder resistor, a buck-boost constant current module, and a rectifier. The direct-current filtering circuit is connected to the anti-electric shock detection control circuit and the bleeder resistor. The direct-current filtering circuit performs a smoothing procedure to a direct-current pulse voltage signal which is rectified by the bridge rectifier, the direct-current filtering circuit generates a false voltage to the anti-electric shock detection control circuit, and the bleeder resistor reduces the false voltage. The rectifier is connected to the bridge rectifier to receive a rectifier circuit, and the electrical ballast inputs the voltage signal to the bridge rectifier.

A dimmer, including a housing assembly including a plurality of terminals at least partially disposed therein, the plurality of terminals including a line terminal, a neutral terminal, and a load terminal; at least one variable control mechanism coupled to the housing assembly, the at least one variable control mechanism being configured to adjustably select a user adjustable load setting, the user adjustable load setting being adjustable between a minimum setting and a maximum setting; a series pass element disposed in series the line terminal and the load terminal; a sensor producing a sensor output representative of load current at the load terminal; and a controller configured to determine, according to a characteristic of the load current, whether a load connected to the load terminal is a capacitive load, wherein the controller is further configured to, upon determining that the load is a capacitive load, provide sufficient power to the load sufficient to cause the load to illuminate before reducing the power the user adjusted load setting.

A system for controlling lighting includes a control module coupled to a driver, a light source coupled to the driver, a first sensor configured to cooperate with the control module to detect occupancy and control the power delivered to the light source according to a signal provided by the first sensor, and a second sensor configured to cooperate with the control module to detect ambient light and control the power delivered according to a signal provided by the second sensor. A GUI executing on a controller device wirelessly coupled to the control module communicates with the control module to configure the operation thereof, executes on a touch-sensitive display configured to facilitate user interaction with the controller, and creates one or more control groups. The GUI is also operable to control the driver to control the state of the light source. The control module is programmable to cause the driver to control the light source according to the detection by the first sensor of occupancy, turning it on upon detecting that an area is occupied and turning it off after a configurable delay period. The control module is programmable to cause the driver to control the light source according to the detection by the second sensor of ambient light. The system is configurable to include a switch to cause the light source to be turned on without regard to occupancy detected by the first sensor or ambient light detected by the second sensor.

A system for controlling lighting includes a control module coupled to a driver, a light source coupled to the driver, a first sensor configured to cooperate with the control module to detect occupancy and control the power delivered to the light source according to a signal provided by the first sensor, and a second sensor configured to cooperate with the control module to detect ambient light and control the power delivered according to a signal provided by the second sensor. A GUI executing on a controller device wirelessly coupled to the control module communicates with the control module to configure the operation thereof, executes on a touch-sensitive display configured to facilitate user interaction with the controller, and creates one or more control groups. The GUI is also operable to control the driver to control the state of the light source. The control module is programmable to cause the driver to control the light source according to the detection by the first sensor of occupancy, turning it on upon detecting that an area is occupied and turning it off after a configurable delay period. The control module is programmable to cause the driver to control the light source according to the detection by the second sensor of ambient light. The system is configurable to include a switch to cause the light source to be turned on without regard to occupancy detected by the first sensor or ambient light detected by the second sensor.

A lighting apparatus, for example for applications in the show-business or entertainment sector, including: a light-radiation generator, for example a laser generator, configured for projecting a lighting beam towards a lighting space in a certain direction; control circuitry of the light-radiation generator configured for controlling emission of the lighting beam by the light-radiation generator; and processing circuitry configured for calculating a thermal retinal radiance ratio of the light-radiation generator as a function of a distance from the light-radiation generator in the aforesaid direction and for acting on the control circuitry of the light-radiation generator in order to control the lighting beam of the light-radiation generator as a function of the thermal retinal radiance ratio, with the aim of maintaining the aforesaid thermal retinal radiance ratio below unity starting from a certain value of distance from the light-radiation generator in the aforesaid direction.

A lighting apparatus, for example for applications in the show-business or entertainment sector, including: a light-radiation generator, for example a laser generator, configured for projecting a lighting beam towards a lighting space in a certain direction; control circuitry of the light-radiation generator configured for controlling emission of the lighting beam by the light-radiation generator; and processing circuitry configured for calculating a thermal retinal radiance ratio of the light-radiation generator as a function of a distance from the light-radiation generator in the aforesaid direction and for acting on the control circuitry of the light-radiation generator in order to control the lighting beam of the light-radiation generator as a function of the thermal retinal radiance ratio, with the aim of maintaining the aforesaid thermal retinal radiance ratio below unity starting from a certain value of distance from the light-radiation generator in the aforesaid direction.

A photographing system which can securely set a manual light amount to an appropriate light emission amount after changing the manual light amount of a strobe according to a photometry result at the time of pre-light emission. In the photographing system, when a light-emission amount automatic adjustment in a metered manual starts in a manual light-emission mode after setting a light emission amount of the light-emitting part in the main light emission within a first range by a user operation in the manual light-emission mode, a main appropriate light emission amount is calculated on a basis of a photometry result before and after the pre-light emission by a photometric circuit, then in a case where the calculated main appropriate light emission amount falls within a second range and is outside the first range, the light emission amount of the light-emitting part in the main light emission is changed to the main appropriate light emission amount, wherein the second range, wherein the second range, including the first range and wider than the first range, is possible to perform automatic light adjustment in the illumination apparatus.

A photographing system which can securely set a manual light amount to an appropriate light emission amount after changing the manual light amount of a strobe according to a photometry result at the time of pre-light emission. In the photographing system, when a light-emission amount automatic adjustment in a metered manual starts in a manual light-emission mode after setting a light emission amount of the light-emitting part in the main light emission within a first range by a user operation in the manual light-emission mode, a main appropriate light emission amount is calculated on a basis of a photometry result before and after the pre-light emission by a photometric circuit, then in a case where the calculated main appropriate light emission amount falls within a second range and is outside the first range, the light emission amount of the light-emitting part in the main light emission is changed to the main appropriate light emission amount, wherein the second range, wherein the second range, including the first range and wider than the first range, is possible to perform automatic light adjustment in the illumination apparatus.

The lighting circuit for lighting a dielectric barrier discharge lamp includes a direct-current power source, a transformer having a primary winding connected to a positive electrode-side terminal of the direct-current power source and a secondary winding connected to the dielectric barrier discharge lamp, a closed circuit in which the direct-current power source, the primary winding, and a switching element including a parasitic diode are serially connected, and a controller to perform ON/OFF control of the switching element. The controller executes a first step to shift the switching element from an ON state to an OFF state and a second step to shift the switching element from the OFF state to the ON state after a lapse of a predetermined OFF holding time from when a regenerative current flowing through the primary winding reaches a zero value after the first step.