A downlight fixing structure is provided. The downlight fixing structure comprises a housing and a spring. The housing is for accommodating light components. The housing has an insertion lock structure on a side of the housing. The spring comprises a coil portion, a head portion, and a tail portion. The coil portion, the head portion and the tail portion are formed by the same metal wire. The head portion is inserted into the insertion lock structure.

A height adjustable lamp assembly includes a frame, a reel supported by the frame, a canopy surrounding the frame and the reel, an electrical cord wound around the reel, and a lamp. The frame includes a mounting plate configured to couple to a mounting location and a base plate coupled to the mounting plate. The base plate defines a cord aperture. A lower end of the electrical cord extends through the cord aperture. The lamp is coupled to the lower end of the electrical cord. Winding the electrical cord around the reel or paying out the electrical cord from the reel adjusts a height of the lamp.

A height adjustable lamp assembly includes a frame, a reel supported by the frame, a canopy surrounding the frame and the reel, an electrical cord wound around the reel, and a lamp. The frame includes a mounting plate configured to couple to a mounting location and a base plate coupled to the mounting plate. The base plate defines a cord aperture. A lower end of the electrical cord extends through the cord aperture. The lamp is coupled to the lower end of the electrical cord. Winding the electrical cord around the reel or paying out the electrical cord from the reel adjusts a height of the lamp.

A height adjustable lamp assembly includes a frame defining a cord aperture, a reel rotationally supported by the frame, an electrical cord wound around the reel where a lower end of the electrical cord extends through the cord aperture, and a lamp coupled to the lower end of the electrical cord. The reel rotates to wind up or pay out the electrical cord therefrom to adjusts a height of the lamp.

A height adjustable lamp assembly includes a frame defining a cord aperture, a reel rotationally supported by the frame, an electrical cord wound around the reel where a lower end of the electrical cord extends through the cord aperture, and a lamp coupled to the lower end of the electrical cord. The reel rotates to wind up or pay out the electrical cord therefrom to adjusts a height of the lamp.

A track system includes a track. The track includes a track body, a first rail structure and a second rail structure. The track body has an inner surface and an outer surface opposite to the inner surface. The first rail structure is formed on the inner surface of the track body. The second rail structure is formed on the outer surface of the track body.

A track system includes a track. The track includes a track body, a first rail structure and a second rail structure. The track body has an inner surface and an outer surface opposite to the inner surface. The first rail structure is formed on the inner surface of the track body. The second rail structure is formed on the outer surface of the track body.

An LED mounting base, an adjustment mechanism with the LED mounting base and a red dot sighting device with the adjustment mechanism are provided in the present disclosure. The LED mounting base includes a sliding block base and a pedestal in which an LED chip is mounted at the middle of the front end surface thereof. A sliding slot parallel to the length direction of the pedestal is disposed on the front end surface of the sliding block base. One end of the sliding slot is a blind end, and the other end of the sliding slot is an open end. After the pedestal being disposed in the sliding slot, the front end surface of the pedestal is parallel to the front end surface of the sliding block base.

An LED mounting base, an adjustment mechanism with the LED mounting base and a red dot sighting device with the adjustment mechanism are provided in the present disclosure. The LED mounting base includes a sliding block base and a pedestal in which an LED chip is mounted at the middle of the front end surface thereof. A sliding slot parallel to the length direction of the pedestal is disposed on the front end surface of the sliding block base. One end of the sliding slot is a blind end, and the other end of the sliding slot is an open end. After the pedestal being disposed in the sliding slot, the front end surface of the pedestal is parallel to the front end surface of the sliding block base.

A height adjustable lamp assembly includes a frame defining a cord aperture, a reel rotationally supported by the frame, an electrical cord wound around the reel where a lower end of the electrical cord extends through the cord aperture, and a lamp coupled to the lower end of the electrical cord. The reel rotates to wind up or pay out the electrical cord therefrom to adjusts a height of the lamp.