A lighting system having a main direct current (DC) voltage source and controllable lighting fixtures that each have a DC-DC current source. Each lighting fixture includes a DC voltage to current converter and an LED light source, and the DC voltage to current converter outputs a constant current from the DC voltage provided by a AC-to-DC converter. The output current of the DC voltage to current converter is independent of the total number of lighting fixtures in the lighting system and is controlled by injecting control commands to the DC voltage provided to DC-DC current source, wherein the AC power provided to the AC-to-DC converter is turned on and off to turn on and off the lights provided by the lighting fixtures of the lighting system and dimming and/or other lighting controls by injecting control commands into the DC voltage provided to the DC-DC current source.

A lighting system having a main direct current (DC) voltage source and controllable lighting fixtures that each have a DC-DC current source. Each lighting fixture includes a DC voltage to current converter and an LED light source, and the DC voltage to current converter outputs a constant current from the DC voltage provided by a AC-to-DC converter. The output current of the DC voltage to current converter is independent of the total number of lighting fixtures in the lighting system and is controlled by injecting control commands to the DC voltage provided to DC-DC current source, wherein the AC power provided to the AC-to-DC converter is turned on and off to turn on and off the lights provided by the lighting fixtures of the lighting system and dimming and/or other lighting controls by injecting control commands into the DC voltage provided to the DC-DC current source.

The invention relates to an electric unit for connecting to a DIN rail (50), having means for contacting the lines (70) of a busbar (60), said means comprising a rotatable contacting element (30, 40, 50), the outer circumference of which is equipped with contacts (32, 42, 52, 53, 62, 63). A first group of contacts (32, 52, 62) and a second group of contacts (42, 53, 63) are provided, wherein the contacts of the first group are arranged so that, when the contacting element (30, 40, 50) is rotated they contact contact lines (70) extending in a first place (A1), and the contacts of the second group are arranged so as to contact lines extending in a second plane (B1).

The invention relates to an electric unit for connecting to a DIN rail (50), having means for contacting the lines (70) of a busbar (60), said means comprising a rotatable contacting element (30, 40, 50), the outer circumference of which is equipped with contacts (32, 42, 52, 53, 62, 63). A first group of contacts (32, 52, 62) and a second group of contacts (42, 53, 63) are provided, wherein the contacts of the first group are arranged so that, when the contacting element (30, 40, 50) is rotated they contact contact lines (70) extending in a first place (A1), and the contacts of the second group are arranged so as to contact lines extending in a second plane (B1).

A mounting profile for lighting system of suspended ceiling, which comprises a comprehensive triple-section aluminium profile, where repositionable wireless luminaires fitted with magnets can be used on the mounting profile and comprises devices for fastening stretch ceiling material as well as other types of suspended ceiling materials thereto.

A luminaire (30) or electrical unit for connection to a supporting rail (10) has a contacting element (40, 50, 60), which is introducible into the supporting rail profile (15) and has connection contacts (42, 52, 62) mounted adjustably in order to bear against lines (25) of the busbar (20) in a state in which the contacting element (40, 50, 60) has been inserted into the supporting rail profile (15). The contacting element (40, 50, 60) has at least one contact block (41, 42, 51, 52, 61, 62) with connection contacts (43, 53, 63), which is linearly laterally adjustable between an open position and a contacting position.

A luminaire (30) or electrical unit for connection to a supporting rail (10) has a contacting element (40, 50, 60), which is introducible into the supporting rail profile (15) and has connection contacts (42, 52, 62) mounted adjustably in order to bear against lines (25) of the busbar (20) in a state in which the contacting element (40, 50, 60) has been inserted into the supporting rail profile (15). The contacting element (40, 50, 60) has at least one contact block (41, 42, 51, 52, 61, 62) with connection contacts (43, 53, 63), which is linearly laterally adjustable between an open position and a contacting position.

Apparatus and methods for deployment of fixtures. The apparatus may include a system for controlling deployed fixtures. The system may receive user commands different devices in different formats. The fixtures may be independently addressable. The fixtures may be magnetically supported by a fixture support. A brace may join two or more fixture supports without reducing space available to support fixtures. The brace may join a fixture support to a fixture support accessory. An accessory may include a variable-angle junction. The fixture may include articulating joints for controlling the direction of a beam. The fixture may include a lens having an electrically controllable beam spread angle. The fixture may be stowable in the fixture support. The fixture may be slidable along a cord to adjust a height of the fixture. The fixture may include an extendable ring. The system may coordinate motions of the fixtures to follow a target. The fixture may include an elongated board. The elongated board may include a non-polar power socket.

Apparatus and methods for deployment of fixtures. The apparatus may include a system for controlling deployed fixtures. The system may receive user commands different devices in different formats. The fixtures may be independently addressable. The fixtures may be magnetically supported by a fixture support. A brace may join two or more fixture supports without reducing space available to support fixtures. The brace may join a fixture support to a fixture support accessory. An accessory may include a variable-angle junction. The fixture may include articulating joints for controlling the direction of a beam. The fixture may include a lens having an electrically controllable beam spread angle. The fixture may be stowable in the fixture support. The fixture may be slidable along a cord to adjust a height of the fixture. The fixture may include an extendable ring. The system may coordinate motions of the fixtures to follow a target. The fixture may include an elongated board. The elongated board may include a non-polar power socket.

A support rail for luminaires or electrical units (60) has a support rail profile (50), which encloses an elongated receiving space, along with at least one busbar (55), arranged in the receiving space, with contactable conductors (58), wherein the support rail (50) further has, on its outside, display means (10) for visually representing the function of the conductors (58).