Abstract: A dimmer comprising a controller and a wireless adapter coupled to the controller. The dimmer is connected to a LED lamp through a switched AC line. The controller is configured to send to the lamp user control information, and provisioning information for allowing the lamp to distinguish the control information transmitted by the dimmer from control information transmitted by other dimmers in the vicinity of the lamp. For performing the provisioning, the controller is configured, after turning-ON the lamp, to wirelessly transmit thereto, at a provisioning frequency F0, provisioning information comprising an identification of an RF frequency Fn that is preselected as the dimmer-specific frequency for controlling the lamp, and to vary the wireless transmit frequency from F0 to Fn for henceforth sending thereat the control information to the lamp.

Abstract: Disclosed is a control system for a dimmable LED lamp. The LED lamp comprises a regulated constant current power supply (PS). A dimming control signal D between Dmax and Dmin results in PS output current (Iout) between Imax and Imin respectively, Imin>0, for powering a LED array. For achieving LED current IL lower than Imin, the control system increases D so as to determine Iout as IL+Imin and causes a bleeder unit to load the PS by Imin.

Abstract: A dimmer comprising a controller and a wireless adapter coupled to the controller. The dimmer is connected to a LED lamp through a switched AC line. The controller is configured to send to the lamp user control information, and provisioning information for allowing the lamp to distinguish the control information transmitted by the dimmer from control information transmitted by other dimmers in the vicinity of the lamp. For performing the provisioning, the controller is configured, after turning-ON the lamp, to wirelessly transmit thereto, at a provisioning frequency F0, provisioning information comprising an identification of an RF frequency Fn that is preselected as the dimmer-specific frequency for controlling the lamp, and to vary the wireless transmit frequency from F0 to Fn for henceforth sending thereat the control information to the lamp.

Abstract: A method of automatic LED lamp provisioning in a lighting system comprising a dimmable LED lamp and a dimmer. The method comprises the following steps performed in the lamp: Upon turn-ON, checking a stored listening RF frequency value, which is one of a predefined provisioning frequency F0 and a control frequency Fn which is specific to the dimmer. If the stored listening frequency is F0, listening on F0 during a predefined provisioning waiting period for receiving from the dimmer provisioning information comprising the value of the dimmer specific Fn, and upon receiving the provisioning information, storing the Fn value for listening thereon following the next turn-ON events and varying the listening frequency to Fn for receiving from the dimmer control information thereon. If the stored listening frequency is Fn, listening on Fn for receiving the control information from the dimmer.

Abstract: A method of automatic LED lamp provisioning in a lighting system comprising a dimmable LED lamp and a dimmer. The method comprises the following steps performed in the lamp: Upon turn-ON, checking a stored listening RF frequency value, which is one of a predefined provisioning frequency F0 and a control frequency Fn which is specific to the dimmer. If the stored listening frequency is F0, listening on F0 during a predefined provisioning waiting period for receiving from the dimmer provisioning information comprising the value of the dimmer specific Fn, and upon receiving the provisioning information, storing the Fn value for listening thereon following the next turn-ON events and varying the listening frequency to Fn for receiving from the dimmer control information thereon. If the stored listening frequency is Fn, listening on Fn for receiving the control information from the dimmer.

Abstract: A method and system for allowing automatic provisioning of a LED lamp in a dimmer system. The dimmer powers the lamp through a switched AC line. A wireless link serves for information exchange between the dimmer and the lamp. When the lamp is turned on by the dimmer, it starts a short waiting period in which it expects to wirelessly receive from the dimmer a provisioning message including a dimmer identification, which it saves to identify dimming messages the dimmer. Another aspect of the invention is disclosed in the above dimmer system, wherein the lamp comprises a backup battery. The dimmer wirelessly informs the lamp upon voltage drops at its input caused by user OFF actions and/or by AC supply outage. The lamp is configured to assume backup mode only upon detecting, based on the above information, a voltage drop at its input caused by an AC supply outage.

Abstract: A method for monitoring and controlling lighting devices is disclosed, comprising: establishing a wireless link between each of the lighting devices and a wireless device, measuring in the wireless device a received wireless signal strength for each of the received wireless signals, creating in the wireless device a lighting device list such that the included lighting devices are ordered respectively to their received wireless signal strengths, and performing in the wireless device at least one predefined action based on the lighting device list.

Abstract: A method, apparatus and system for controlling a lighting driver are provided, wherein a lighting driver comprises a driving unit configured to receive AC power through an AC power line, a control unit coupled to the driving unit and configured to affect one or more operating parameters of the driving unit, and an interface port coupled to the control unit and adapted to accept a wireless adapter, thereby allowing remote control of the driving unit operation through the wireless adapter and the control unit.

Abstract: A method and system for controlling a lighting arrangement is provided, wherein the lighting arrangement comprises two or more lighting drivers, the lighting drivers have a lighting parameter, and the lighting parameter has at least two lighting parameter values, each value related to a different one of the two or more lighting drivers. The method comprises the steps of: individually adjusting at least one of the at least two lighting parameter values without substantially affecting any other of the at least two lighting parameter values, and further adjusting the lighting parameter in an amount related to the at least two lighting parameter values as a whole.

Abstract: A method, apparatus and system for controlling lighting color are disclosed, wherein a lighting assembly is provided, comprising first and second lighting sources of different colors interconnected in opposite polarity directions. The lighting color control method comprises the step of applying a bipolar driving signal to the lighting assembly, thereby alternately driving the first and second lighting sources for achieving a lighting color, in particular a lighting temperature, respective to the polarity ratio of the bipolar driving signal.

Abstract: In embodiments of the present invention, there is provided a lighting control device connected in series with an AC supply line of a lighting driver at a control access point, wherein the lighting control device comprises an AC/DC converter configured to receive an input AC voltage from the AC supply line and to convert it to an output DC voltage. The lighting control device further comprises a lighting control circuit configured to use the output DC voltage as a power supply and to transmit control information to the driving unit.

Abstract: A metal halide magnetic/electronic ballast with a compensation function for adjustment in autotransformer output voltage, which applies the compensation in various steps of voltage, to maintain the power constant. The metal halide ballast provides constant monitoring of the autotransformer input voltage, enabling the level to be stepped by triac switching. The triac switching is controlled by a switching control provided by a microcontroller. Less components are required, making the present invention simpler, less expensive to manufacture and more reliable.

Abstract: A track lighting hybrid illumination system comprising a power supply circuit (11, 41, 22) having an input for connecting to a voltage source (12, 42) of low frequency for providing an output voltage with altered electrical characteristics, and a pair of conductors (19, 23, 43, 48) coupled to an output of the power supply circuit. A first lamp (29, 25, 31) is coupled to the conductors via a second power supply circuit (28, 26, 34), and at least one further lamp (29, 24, 25, 31) with electrical power requirements of a different characteristic to the first lamp coupled to the conductors.

Abstract: A metal halide magnetic/electronic ballast with a compensation function for adjustment in autotransformer output voltage, which applies the compensation in various steps of voltage, to maintain the power constant. The metal halide ballast provides constant monitoring of the autotransformer input voltage, enabling the level to be stepped by triac switching. The triac switching is controlled by a switching control provided by a microcontroller. Less components are required, making the present invention simpler, less expensive to manufacture and more reliable.

Abstract: A low voltage illumination system, comprising a pair of terminals for connecting to a source of low frequency a.c. voltage, a frequency converter coupled to the source of a.c. voltage for converting the low frequency a.c. voltage to high frequency a.c. voltage, and a step down transformer coupled to an output of the frequency converter for converting to high frequency, low voltage a.c. A synchronous rectifier is coupled to a secondary of the step down transformer for converting the high frequency low voltage a.c. to a low magnitude nominally d.c. voltage, and a pair of conductors is connected to the low magnitude nominally d.c. voltage for connecting low voltage lamps thereto. Optionally, the step down transformer is of planar design and an integral overload protection circuit is provided responsive to a drop in output impedance across the conductors commensurate with an overload for interrupting power thereto.