The present invention shows a system for hanging lights and cable hooks from an I-beam overhead girder in a construction site for the purpose of getting lights and cables off the floor in order to meet construction regulations.

A medical device assembly including a support member, a first arm rotatably connected to the support member at a first rotary axis, a second arm rotatably connected to the first arm at a second rotary axis, and a medical unit connected to an end of the second arm opposite the first arm. The first arm is prevented from rotating about the first rotary axis when the first arm and the second arm are substantially aligned. The first arm and/or the second arm can also be prevented from rotating to prevent the medical device assembly from abutting against an obstacle.

A lighting apparatus includes a light source, a driver, a light housing, an actuator unit, a light passing cover, and an external switch. The driver is used for converting an external power to a driving current supplied to the light source. The light housing is used for disposing the light source and the driver. The actuator unit is connected the driver for configuring a working status of the driver. The light passing cover is fixed to the light housing for a light of the light source to pass through. The external switch is mechanically connected to the actuator via a through hole of the light passing cover for the actuator to generate a control message to the driver. The driver controls the light source according to the control message to configure the working status of the light source.

A lighting device includes a housing including a hole; a light source body including a light emitting module with a terminal; and electrical connection means including a portion projecting through the hole and having a connector electrically connected to the terminal and physically connecting the housing with the light source body.

A lighting arrangement includes a first lighting module and a second lighting module. A rail is designed for coupling or at least partially accommodating the first lighting module and the second lighting module. A conductor device is provided along the rail in order to provide electric current and a control signal. The first lighting module is configured to be coupled to the conductor device to receive electric current for supplying the first lighting module and the control signal from the conductor device. The first lighting module is configured to process the control signal and to control the first lighting module in dependence upon the control signal. The first and the second lighting module are configured to be coupled to one another such that a signal for controlling the second lighting module can be communicated from the first lighting module to the second lighting module.

A lighting arrangement includes an assembly, a rail profile, and an adapter unit. The assembly is designed as a lighting module or lighting unit coupled to the assembly or accommodated by the assembly. The rail profile has a first region for accommodating the assembly and a second region, in which a conductor device for providing electrical energy is provided along the rail profile. The adapter unit is accommodated in the second region of the rail profile and is configured to be electrically coupled to the conductor device in the second region, to receive electrical energy from the conductor device and to provide electrical energy to the assembly for supplying the lighting module or the lighting unit. The adapter unit and the assembly are configured for electrical coupling so that the assembly displaces along a longitudinal direction of the rail profile relative to the adapter unit inserted into the second region.

A luminaire for installing in a grid ceiling includes at least one catch which is arranged in such a way on the luminaire and designed such that the at least one catch snaps into place automatically behind a portion of an element of the grid ceiling and thus engages behind the portion of the element of the grid ceiling in order to hold the luminaire on the grid ceiling. In addition, an assembly for a grid ceiling includes at least one ceiling profile element and at least one such luminaire.

A twist-and-lock mounting bracket may secure a lighting fixture to a mounting surface. The twist-and-lock mounting bracket may define an aperture having features corresponding to the shape of a twist-and-lock element disposed on a housing of a lighting fixture. Accordingly, the twist-and-lock element may be configured to extend through the aperture while the corresponding features of the twist-and-lock element and the aperture are aligned. The housing may then be rotated such that the tabs do not align with the corresponding features of the aperture, and the twist-and-lock element is thereby prevented from sliding through the aperture. The mounting bracket may be secured to a junction box positioned within a mounting surface, or it may be secured to a biasing bracket having one or more second resilient members configured to engage the interior of a recessed can light, such that the lighting fixture may be secured to the recessed can light.

In an example embodiment, a lighting fixture comprising a lighting device and a mounting bracket is provided. The lighting device comprises a front cover, a back cover, a frame, and at least one LED mounted within the interior of the lighting device. The frame has an interior edge that is in contact with a perimeter of the front cover and a perimeter of the back cover. The front cover, the back cover, and the frame define the interior of the lighting device. At least one of the frame and the back cover comprises one or more attachment mechanisms. The mounting bracket comprises a junction box mounting element configured for securing the mounting bracket to a junction box or a mounting surface, and one or more attachment mechanism mating elements configured to mate with the one or more attachment mechanisms when the lighting device is rotated within the mounting bracket to secure the lighting device into the mounting bracket.

The invention provides a luminaire (100) comprising an array (102) of light exit windows (104, 104′, 104″, 204, 304′, 304″, 404′, 404″, 604, 804′, 804″, 804′″, 904′, 904″, 1004, 1004′, 1004″), wherein each light exit window comprises a material adjustable between at least a first state having a first translucence and a second state having a second translucence and an electrode arrangement (112) for adjusting said translucence of the material. Such a luminaire (100) can provide differing lighting effects whilst providing illumination and, additionally, differing aesthetic effects when viewed under ambient lighting. There is also provided a method of configuring the luminaire (1100), a computer program product for implementing the method (1200), a computing device including the computer program product (1300) and a lighting system comprising the luminaire (100).