Abstract: After the LEDs 2 (red LEDs (R), green LEDs (G) and blue LEDs (B), or white LEDs (W)) are mounted on the frame 3, without dicing the frame 3 for dividing the LEDs 2 into pieces, the tie bar is punched off to form an electric circuit. Thus, the RGB three primary color LED light source 1A or the white LED light source 1B that emits light in the state of the frame 3 can be manufactured.

Abstract: An light device, includes a plurality of first light cells arranged axisymmetrically about an axis; a plurality of second light cells arranged axisymmetrically around the axis; and a controller coupled to a brightness adjust unit, and determines whether to activate the first light cells and second light cells according to a brightness adjust value of the brightness adjust unit, wherein the average distance between the first light cells and the axis is shorter than the average distance between the second light cells and the axis.

Abstract: An emergency light unit (arranged in an elevator cage) of an elevator installation can be activated. A light sensor unit and a lighting unit are arranged in the elevator cage. The emergency light unit is activated by an elevator control unit in dependence on at least one light intensity value detected by the light sensor unit when the elevator cage door is closed and transmitted to the control unit.

Abstract: The present disclosure provides techniques for a self-commissioning and locating lighting system. The system includes a group of light fixtures, each emitting a unique optical data signal. A remote control device detects the unique optical data signal from the light fixtures when the light fixture is within a visual field of the remote control device. A central controller receives a signal from the remote control device, wherein the signal comprises data regarding the GPS location of the remote control device and the digital identities of the light fixture within the visual field of the remote control, wherein the signal further comprises a control command for operation of the light fixtures, and wherein the central controller sends a control signal to the light fixture implementing the control command.

Abstract: A dimming console serves to store output levels of a plurality of lighting instruments and control the output levels of the plurality of lighting instruments. The dimming console includes an output unit configured to output, to a display, a scene preparation region that displays scenes indicating at least states of the output levels of the plurality of lighting instruments and a scene storage region indicating playback order information regarding a scene playback order; an input unit configured to receive an operation for the scene preparation region and an operation for the scene storage region; and a control unit configured to edit the scenes or the playback order information pursuant to the operation of the input unit and to control the output unit to output the edited scenes or the edited playback order information.

Abstract: A luminaire includes a fixture including at least one light source, a power supply mounted to the fixture for supplying power to the light source, and circuitry in communication with the power supply for controlling the power supplied to the light source dependent upon an ambient temperature, such that the power supplied to the light source is reduced when the ambient temperature falls below the threshold ambient temperature in order to limit the power supplied to the light source while an output of the light source remains substantially constant despite the limited power supplied. A system for indicating when maintenance is required on one or more luminaires in a building by sensing ambient temperatures and determining a difference between the ambient temperatures sensed and providing an indication signal that the determined difference between the ambient temperatures is at or above a threshold difference.

Abstract: A backlight driving circuit includes a constant current driving chip, a power module, and a light emitting diode (LED) lightbar coupled with the power module. The constant current driving chip includes a control module that controls switching frequency of the power module, and an adjusting module that adjusts duty cycle of effective current flowing through the LED lightbar. The control module includes a frequency pin used to set the switching frequency of the power module. An external pulse-width modulation (PWM) dimming signal is sent to the adjusting module of the constant current driving chip. The backlight driving circuit further includes a detection module that detects duty cycle of the PWM dimming signal, and a monitor module coupled with the detection module of the backlight driving circuit.

Abstract: An operating device (1) is provided for at least one luminous element (2), including a measuring device configured to measure a temperature (T) present in the operating device (1) or in the surroundings of the operating device, and at least one interface connected to the measuring means and configured to output a piece of information regarding the measured temperature (T).

Abstract: Disclosed are dimmable LED driver circuits and methods. A dimmable LED driver can include: an SCR, an electronic transformer, and a rectifier bridge to convert an AC voltage to a DC voltage signal; a power stage circuit that receives the DC voltage signal, and outputs a constant current to drive an LED load, where the power stage circuit includes first and second power stage circuits, the first power stage circuit receiving the DC voltage signal, and generating a first output voltage to the second power stage; and an input current control circuit that receives an input current of the first power stage circuit and the first output voltage, and generates a first control signal to control the input current as a square wave signal during an on time of the SCR, and the input current is substantially zero during an off time of the SCR.

Abstract: A system, method, and computer program for deploying a lighting system throughout a building using power over Ethernet is provided. In exemplary embodiments, one or more LED lighting structures may be powered using Ethernet cable in a building, and may be controlled by a distributed management system throughout a communication network.

Abstract: An operating device (1) for driving a multicolored light source (2) is specified, comprising a touch-sensitive operating element (10), which is designed to be operated by means of touch by a user, a proximity switch (11), which is designed to switch on the touch-sensitive operating element (10) when the user approaches the touch-sensitive operating element (10), and a control device (12), which is designed to control a multicolored light source (2), wherein the control device (12) is designed to control the multicolored light source (2) with a predetermined number of colors and brightnesses, and the touch-sensitive operating element (10) is designed to select a color and a brightness from the predetermined number of colors and brightnesses depending on the touch by the user.

Abstract: Apparatus and methods are presented for compensating for offsets in digital-to-analog converters (DACs). An apparatus may comprise a gain block. The non-inverting input of the gain block may be provided with a bias voltage selected to exceed the worst-case expected positive offset of a DAC. Feedback from the output of the gain block may be provided to a processor. The processor may be connected to drive the DAC.

Abstract: Disclosed is a method for controlling a lighting apparatus comprising a first light source unit, a second light source unit and a third light source unit, all of which emit lights having mutually different color temperatures and mutually different color coordinates, the method comprising: outputting an R component signal, a G component signal and a B component signal, each of which respectively corresponds to light quantities of an R component, a G component and a B component of lights outputted from the first light source unit, the second light source unit and the third light source unit; receiving the R component signal, the G component signal and the B component signal and generating a comparative color coordinate; and comparing the comparative color coordinate with standard color coordinates located within an area formed by the respective color coordinates of the first, the second and the third light source units, and controlling light quantities of the first, the second and the third light source units i

Abstract: A lighting system comprising multiple linear lighting module building blocks is described. A lighting module is designed to emit light in a linear configuration, and multiple lighting modules are concatenated to emit light in a single linear configuration. A mechanical coupling system allows the lighting modules to be inserted into the linear configuration from a direction perpendicular to the linear configuration. The housing of the lighting modules is designed to allow the module to be clipped together in the linear configuration.

Abstract: A light source device includes a light source unit configured to emit primary light and an illumination unit configured to optically convert the primary light to secondary light and then emit the secondary light. The light source device further includes a connector configured to allow the light source unit and the illumination unit to be attached to and detached from each other. Furthermore, the light source device includes an information transmitter configured to transmit illumination unit information to the light source unit, the illumination unit information being information regarding the illumination unit.

Abstract: The present invention discloses a backlight driving circuit applied to an electronic device. The backlight driving circuit includes a light-emitting diode unit, a photosensitive element, and a control circuit. The light-emitting diode unit has an anode terminal and a cathode terminal. The photosensitive element is coupled between the cathode terminal of the light-emitting diode unit and a ground, wherein the resistance of the photosensitive element changes with the ambient light level around the electronic device. The control circuit includes a sensing terminal and an output terminal. The sensing terminal receives a feedback voltage. The output terminal provides a power source to the anode terminal of the light-emitting diode unit according to the feedback voltage to control the luminance of the light-emitting diode unit, wherein the feedback voltage is decided by the resistance of the photosensitive element.

Abstract: Techniques are disclosed for manipulating both colored and tunable white lighting systems in order to enhance visual comfort and allow an observer's eyes to recover from exposure to colored light. A lighting system may gradually adjust the color, color temperature, and intensity of various multi-chip LED panels in order to provide pleasant and acceptable changes in light settings. Instead of abruptly switching from one light setting to another, a lighting system may fade to an intermediate transition setting and subsequently fade to the final light setting, allowing an observer's eyes time to adapt to the new light settings. In one example, switching from blue light to a neutral white light may involve a gradual fading from blue light, to a cool white light, and then to a neutral white light, thus allowing the end user's eyes to adapt to the new light settings.

Abstract: A circuit arrangement may include an input for coupling to a supply voltage; n semiconductor light source units comprising a driver device; wherein the units are coupled in parallel, wherein each driver device comprises a PWM controller. A respective controller is designed to provide a PWM signal at a respectively predefinable frequency to a control electrode of a respective converter switch. The arrangement includes current measuring devices which are designed for measuring the current through a respective string having at least one semiconductor light source; and a control device having control outputs, wherein each controller has a clock input, wherein a respective control output is coupled to a respective clock input of the controllers, wherein the control device is designed to provide clock signals at its control outputs, said clock signals being phase-shifted by 360°/n with respect to one another.

Abstract: A dimmable LED illumination system includes a power converting circuit and a lamp. The power converting circuit is electrically connected to a power source to convert electric power of the power source into a voltage signal. The lamp includes a DC/DC converter and a LED module, wherein the DC/DC converter is electrically connected to the power converting circuit to convert the voltage signal into a corresponding current signal. The LED module is electrically connected to the DC/DC converter to be driven by the current signal to emit light. By adjusting a voltage provided by the power converting circuit, a current provided by the DC/DC converter could be adjusted as well, which changes a luminance of the LED module.

Abstract: An LED luminescence apparatus includes a plurality of LED units connected in series which are configured to receive a unidirectional ripple voltage, a plurality of switch units, one end of each being connected to the cathode of one of the plurality of LED units, a plurality of constant current control circuit units, one end of each being connected to an another end of a respective switch unit to receive a current from the respective switch unit, each of the constant current control circuit units being configured to output a current control signal to the respective switch unit to control a magnitude of the received current to have a specific value, and a current comparison unit to receive currents flowing from the plurality of switching units, and generate a plurality of switching control signals for the respective switch units to sequentially drive the plurality of constant current control circuit units.

Abstract: System and method for providing at least an output current to one or more light emitting diodes. The system includes a control component configured to receive at least a demagnetization signal, a sensed signal and a reference signal and to generate a control signal based on at least information associated with the demagnetization signal, the sensed signal and the reference signal, and a logic and driving component configured to receive at least the control signal and output a drive signal to a switch based on at least information associated with the control signal. The switch is connected to a first diode terminal of a diode and a first inductor terminal of an inductor. The diode further includes a second diode terminal, and the inductor further includes a second inductor terminal.

Abstract: The present invention relates to a control device adapted to control properties of light emitted from a light source. The control device may comprise a touch-sensitive user interface adapted to visually indicate a range of available values representing at least one of the properties and to enable a user to control the represented property on the basis of a location touched on the touch-sensitive user interface. The controlled property may be adjusted by means of a communication unit adapted to communicate to the light source control signals corresponding to user input. The user interface may comprise at least one discontinuity-indicating element adapted to visually indicate a step discontinuity in the range of available values representing the at least one property.

Abstract: A configurable light emitting diode (LED) driver for powering a set of light fixture loads including a power circuit and a primary controller for controlling the power circuit. The driver further includes a set of output current drivers, each of the set of output current drivers connected to one of the set of light fixture loads for controlling the associated light fixture load and a secondary controller for controlling the set of output current drivers. The driver also includes an apparatus for mapping the set of output current drivers to various dimming zones and for mapping output channels into groups.

Abstract: The lighting system includes a plurality of lighting apparatuses and a controller configured to control the lighting apparatuses. Upon receiving a random number generation instruction from the controller, the lighting apparatus generates a first random number and a second random number by using a random number generation unit, and counts synchronization signals sent from the controller. When acknowledging that the counted number of the synchronization signals is equal to the first random number, the lighting apparatus sends the second random number to the controller. The controller identifies the lighting apparatuses based on the second random numbers respectively received from the lighting apparatuses, and uniquely allocates mutually different addresses to the respective identified lighting apparatuses.

Abstract: A mobile application is disclosed that allows a user to configure an LED-based lamp. The LED-based lamp has the capability of color matching color spectrums and calibrating its correlated color temperatures, brightness, and hue based on a color model. The mobile application can send or schedule commands actively or passively to activate the color matching and calibration process on the LED-based lamp. The mobile application can further receive status information regarding the LED-based lamp including fault detection, estimated life time, temperature, power consumption, or any combination thereof.

Abstract: There is provided a light emitting diode driving apparatus capable of uniformly maintaining current balance between light emitting diode channels. The light emitting diode driving apparatus includes: a DC to DC converting unit converting the direct current power into settable driving power; a detecting unit detecting voltage drops generated in each of a plurality of light emitting diode channels each having a plurality of light emitting diodes; a converting unit converting an analog value into a digital value; and a driving unit differentially setting duty cycles of switching signals according to the digital values from the converting unit to drive the plurality of light emitting diode channels.

Abstract: A two-way interactive light control device includes a plurality of lamps. Each lamp includes a microcomputer processor, a controlling code setting unit, a controlled code setting unit, a signal transmitting and receiving unit, a light drive unit and light emitting diodes. When the device is started, it can receive a wireless signal automatically and decode to identify whether the lamp is the same product. If there is no same lamp around, the device will set itself as the controller to keep searching the same lamps and to drive the light emitting diodes to twinkle. When the device receives a signal from the same lamps, the same lamps will be the controlled with their light emitting diodes to twinkle synchronously. Thus, when many same lamps meet, they can provide safe and warning effects.

Abstract: Provided are circuits and methods for a digital controller for an electronic ballast for a fluorescent lamp, comprising a feed-forward loop that provides information about a voltage firing angle, and a pulse width modulator that controls a duty ratio of at least one power switch of the electronic ballast according to the information. The digital controller may include a duty ratio controller implemented in the pulse width modulator. The digital controller may include one or more functions such as dimming, maintaining high power factor throughout the dimming range, low lamp power detection, lamp soft-start, and DC-link capacitor over-voltage detection for end of life protection or lamp failure protection. In one embodiment the ballast is a single stage, single switch ballast.

Abstract: A configurable light emitting diode (LED) driver for powering a set of light fixture loads comprising a power circuit which includes an inrush current limit and a DC/DC convertor, a power factor correction (PFC) boost connected to the inrush current limit and the DC/DC converter, a regulated output voltage bus connected to the DC/DC converter, and a primary digital controller for controlling the power circuit. The driver further includes a set of output current drivers, each of the set of output current drivers connected to one of the set of light fixture loads for powering the associated light fixture load. The driver also includes an apparatus for configuring the set of output current drivers to an output current set point and at least one power limit connected to the regulated output voltage bus.

Abstract: A controller for a lighting arrangement is provided, comprising a detector unit having a field of view and a pointing direction. The controller furthermore includes an interface unit for interfacing with the lighting arrangement, and a processing unit connected to the detector unit and the interface unit. The detector unit is arranged to provide detection data including parameters related to one or more identifiable beacons within the field of view of the detector unit. The processing unit is arranged to associate the detection data with a set of lighting parameters for the lighting arrangement and to control the lighting arrangement via the interface unit in accordance with the set of lighting parameters. Also a method of controlling alighting arrangement is provided.

Abstract: Provided is a lighting apparatus that may form and control a multi-zone of a plurality of lighting devices connected to a wireless network. The lighting apparatus may include a plurality of devices including a plurality of lighting devices included in a network set in advance, a coordinator to manage the network, a remote controller to control a multi-zone that is included in the network and that performs grouping of the plurality of lighting devices into a plurality of groups.

Abstract: A load driving apparatus related to light emitting diodes (LED) is provided. The load driving apparatus includes a power conversion circuit, a complex function circuit, and a control chip. The power conversion circuit receives a DC input voltage and provides a DC output voltage to at least one LED string in response to a gate pulse-width-modulation (PWM) signal. The complex function circuit is serially connected with the LED string and provides a short-protection mechanism. The control chip is coupled to the power conversion circuit and the complex function circuit. The control chip generates the gate PWM signal to control the operation of the power conversion circuit, and when the LED string is short-circuited, the control chip controls the complex function circuit to activate the short-protection mechanism, so as to protect the load driving apparatus from being damaged.

Abstract: Representative embodiments of the invention provide a system, apparatus, and method of controlling an intensity and spectrum of light emitted from a solid state lighting system. The solid state lighting system has a first emitted spectrum at a full intensity level and at a selected temperature, with a first electrical biasing for the solid state lighting system producing a first wavelength shift, and a second electrical biasing for the solid state lighting system producing a second, opposing wavelength shift. Representative embodiments provide for receiving information designating a selected intensity level or a selected temperature; and providing a combined first electrical biasing and second electrical biasing to the solid state lighting system to generate emitted light having the selected intensity level and having a second emitted spectrum within a predetermined variance of the first emitted spectrum over a predetermined range of temperatures.

Abstract: Sensors and lighting components are provided that are capable of matching an emitted color to a color observed at a remote location. The sensor measures a light characteristic at a first location, and provides data to a remote lighting component, such as via a wireless connection. The lighting component is configured to emit light based upon the light characteristic, and thus is able to match an observed lighting condition. The lighting component may match the color, intensity, temperature, pattern, texture, or other characteristic of light at a remote location.

Abstract: A ballast lead wire configuration includes a ballast having a pair of power inputs and a pair of power outputs. A primary lamp is electrically connected to the ballast. A first primary lamp ballast terminal is formed on the primary lamp and electrically connected to the ballast. A second primary lamp ballast terminal is formed on the primary lamp and electrically connected to the ballast. A second lamp electrically connected to the ballast, and the second lamp is electrically connected to the first lamp in series. A first secondary lamp ballast terminal is formed on the secondary lamp and electrically connected to the ballast. A second secondary lamp ballast terminal is formed on the secondary lamp and electrically connected to the ballast. The first lamp and the second lamp are florescent lamps over 36 inches long.

Abstract: Techniques for constructing a solid-state lighting module that includes solid-state light emitters that emit light of different colors and are selected from separated groups of solid-state light emitters that emit light of two or more separated colors, wherein one or more solid-state light emitters are selected from each of the separated color groups of solid-state light emitters. The lighting module includes a programmable device that stores or remembers desirable optical intensities of the separated color groups of solid-state light emitters, and a control circuit that individually controls light intensity of each of the separated color groups of solid-state light emitters. The light control circuit is coupled to or in communication with the programmable device to receive the desirable optical intensities of the separated groups of solid-state light emitters and is operable to adjust the intensities of the separated color groups of solid-state light emitters based on the desirable intensities.

Abstract: Systems and methods of controlling the output of a light fixture. The light fixture includes a plurality of light sources and a controller. The controller is configured to receive a first input control value for a first control parameter and a first input control value for a second control parameter. The controller is also configured to determine a first difference between the first input control value for the first control parameter and a second input control value for the first control parameter stored in a memory and determine a second difference between the first input control value for the second control parameter and a second input control value for the second control parameter stored in the memory.

Abstract: A lighting device using an electroluminescent material, in which color mixing and dimming can be performed by a simple method, is provided. A lighting device including a first light-emitting element and a second light-emitting element which emits light having a wavelength longer than that of light emitted from the first light-emitting element and starts to emit light at a lower voltage than the first light-emitting element, is provided. The first light-emitting element and the second light-emitting element are connected in parallel, whereby a mixed color of emission colors of the first light-emitting element and the second light-emitting element is controlled by a voltage applied to the first light-emitting element and the second light-emitting element.

Abstract: A backlight module is disclosed. The backlight module comprises a circuit board, at least one light source disposed on the circuit board, and a positive probe-point and a negative probe-point, both provided on the circuit board. The positive and negative probe-points are electrically connected to the light source, and the positive probe-point and the negative probe-point are electrically connected with a current dividing element so that the light source is connected in parallel with the current dividing element. The positive probe-point and the negative probe-point are also collectively configured to detect an electrostatic damage of the backlight module.

Abstract: One aspect of the present invention provides an organic EL module that can easily change a layout according to an installation environment while a characteristic of the organic EL module is taken advantage of. The organic EL module includes: an organic EL device in which a first electrode layer, a functional layer, and a second electrode layer are stacked on a substrate having a planar expanse, at least one of planes of the organic EL device constituting a light emitting surface; and at least three connector units that are arranged on a back side of the light emitting surface. At this point, the connector unit is arranged with a planar expanse, the connector unit includes feeding terminals, and the feeding terminals are electrically connected in parallel to one another and electrically connected to the first electrode layer or the second electrode layer.

Abstract: The light-emitting device having an equivalent circuit, includes at least four terminals, numbered from first terminal to fourth terminal, for electrical power feeding; a first light-emitting diode, arranged between the first terminal and the second terminal, configured to not emit light when a voltage is applied between the second terminal and one of the third terminal and the fourth terminal, and configured to emit light when a. voltage is applied between the first terminal and one of the third terminal and the four the terminal; and a second light-emitting diode, arranged between the third terminal and the fourth terminal, and configured to not emit light when the voltage is applied between the third terminal and one of the first terminal and the second terminal and configured to emit light when a voltage is applied between the fourth terminal and one of the first terminal and the second terminal.

Abstract: A display circuit includes a first pulse width modulated (PWM) signal line coupled to a first switch, a second PWM signal line coupled to a second switch and the signal line, a transistor coupled to the second signal line between the first signal line and the second switch, a third switch coupled to a third PWM signal line, a fourth switch coupled to a fourth PWM signal line, a fifth switch coupled to a fifth PWM signal line, a light emitting diode (LED) including a red element coupled between the first and third switches, a green element coupled between the first and fourth switches, and a blue element coupled between the first and fifth switches, and an LED including a red element coupled between the second and third switches, a green element coupled between the second and fourth switches, and a blue element coupled between the second and fifth switches.

Abstract: An LED driving apparatus is provided. The apparatus includes an LED Portion 10, a charging/discharging capacitor 111, a capacitor charging and discharging paths, and a capacitor charging constant current portion 110. The LED driving portion 3 controls a current in the LED portion 10. The capacitor 111 is connected in parallel to the LED portion 10. The charging and discharging paths are connected to the capacitor whereby charging and discharging the capacitor, respectively. The constant current portion 110 is connected on the charging path and controls a charging current so that the capacitor is charged at a constant current. When rectified voltage applied to the LED portion becomes high, the capacitor is charged with the charging current through the charging path. When the voltage becomes low, the capacitor is discharged at a discharging current through the discharging path so that the discharging current is applied to the LED portion.

Abstract: A backlight unit includes a DC-DC converter; a voltage control unit which controls output voltage of the DC-DC converter; a plurality of unit light emitting diode arrays; and current deviation compensating unit in connection with input terminals of the plurality of unit light emitting diode arrays. The current deviation compensating unit receives the controlled voltage of the voltage control unit and transfers a feedback signal to the voltage control unit based on the received voltage, and actively compensates a current deviation generated by electrical characteristics of the plurality of unit light emitting diode arrays and transfers the compensated current deviation to the input terminals of the plurality of unit light emitting diode arrays.

Abstract: Disclosed is an improved light-emitting device for an AC power operation. A conventional light emitting device employs an AC light-emitting diode having arrays of light emitting cells connected in reverse parallel. The arrays in the prior art alternately repeat on/off in response to a phase change of an AC power source, resulting in short light emission time during a ½ cycle and the occurrence of a flicker effect. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged during a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor.

Abstract: A circuit for driving multiple light emitting diodes (LEDs) includes at least two sets of LEDs, each set comprised of one or more LEDs in series. The circuit further includes a single inductor connected in series with the two sets of LEDs. At least one set of LEDs is connected to a shunting transistor connected in parallel with the set of LEDs. The duty cycle of the shunting transistor is controlled by a single controller connected to the shunting transistor and the inductor.

Abstract: A system for remote control includes a user device configured to run an application that receives a user input; a remote device including a controller and a controlled device; and a computing cloud being connected to the user device and the remote device through the Internet and configured to convert the user input received at the user device to a command. The controller is configured to receive and execute the command and thereby control the controlled device accordingly. The application is a non-customized application. The controlled device includes a plurality of cascadable LED cubes.

Abstract: A driving circuit for a LED backlight module includes a brightness adjusting module, a current detector, a reference voltage adjusting module, and a comparing module. The current detector is capable of detecting the current of the brightness adjusting module and outputting a detecting result. The reference voltage adjusting module is capable of choosing the corresponding reference voltage corresponding to the detecting result of the current detector. Thus, the reference voltage outputted to the comparing module can be adjusted according to the change of the current of the brightness adjusting module. This reduces the power consumption and the amount of heat generated due to the power consumption, and improves the performance of the LED backlight module.

Abstract: A lighting system and method are provided for controlling a PWM duty cycle. The lighting system is provided with at least one device that is configured to emit light in response to receiving electrical power. The lighting system includes a power circuit and a feedback circuit. The power circuit is configured to selectively supply power to the device at a duty cycle corresponding to a first mode and a second mode, wherein the duty cycle of the first mode is less than 10% of the duty cycle of the second mode. The feedback circuit is configured to provide a feedback signal that is indicative of the energy provided to the device. The power circuit is further configured to disable power to the device during the first mode in response to the energy being greater than a threshold energy value, thereby adjusting the duty cycle.

Abstract: In various embodiments, a method for operating high-pressure discharge lamps, in which high-pressure discharge lamps are operated at the same time in a different thermodynamic state, so that one high-pressure discharge lamp having an emission line emits at a spectral position and at the same time a different high-pressure discharge lamp having an absorption line emits light at the same spectral position, wherein at least some of the light emitted by each high-pressure discharge lamp is converged in a local area.