Indoor lights, is a collective name for the lamps used for lighting in indoor living and working environments.

Indoor lamps and lanterns both decorative role, indoor lights and lighting functions, indoor lights using a variety of shapes and power incandescent lamps (including tungsten halogen lamps) or fluorescent lamps. Indoor lights can be divided into embedded lights, ceiling lights, chandeliers, wall lights, removable lights and track lighting 6 categories, and according to the form of installation of lights on the ceiling and whether it can be moved, can be divided into three major types of lamps and lanterns.

Installed in the ceiling surface, revealing all the shape of a class of lamps. According to the luminous situation is divided into all diffuse, downward diffuse and downward projection 3 types.

• All diffuse type: it uses diffuse or surface pressed with prismatic transparent material lampshade to the surrounding space light. The light source inside the shade is invisible when working, and the light emitted upward illuminates the walls and ceiling. Therefore, the use of light-colored ceilings in the room can reflect as much light as possible from the ceiling.
• Downward diffusion type: the side of the shade is made of opaque or partially opaque material, and the light is transmitted from the translucent shade below in the general lighting lamps and lanterns, which rarely have light illuminating the ceiling.
• Downward projection type: a class of luminaire with a small beam angle used for enhanced lighting or supplemental lighting. Mounted on the ceiling to provide enough light for visual work.

Suspended in a conspicuous place in the room on the ceiling of a class of lamps and lanterns with decorative functions. According to the luminous situation, can be divided into all diffuse, direct - indirect, downward lighting and light source revealed four types.

• All diffuse type: It sends out light to all around, with dual functions of lighting and decoration. To achieve a good decorative effect, commonly used color translucent lampshade and dimmer control the brightness of the light source.
• Direct-Indirect type: There are many upward and downward rays, with little horizontal light. Often installed at a height close to the line of sight, used for lighting at dining tables, fast food restaurants, etc. Some of these hanging height adjustable lamps, pull down when used as enhanced lighting, push up when used for general lighting.
• Downward lighting type: the light emitted will produce a strong shadow. Used in halls, aisles or stairs, etc. for enhanced lighting, used in rooms should usually be equipped with general lighting.
• Light source revealed type: It uses high brightness luminous body, get flicker and excitement, focus on decoration. Generally use bare low power light source, installed in the space above the line of sight. When hanging low, shall use low brightness light source or dimmer to reduce the brightness of the light source, and behind the light with a light-colored wall.

Can be moved and placed in position. There are two types of floor lamps and table lamps, which have a solid base, a pillar and a lampshade that surrounds the light source to play a lighting role. 

• Floor lamp: the shape is taller, placed on the floor or coffee table lamps. The light from the shade and from above plays a general lighting role, and the light from below illuminates the work surface that needs light, playing a role of local lighting.
• Table/Desk lamp: small shape, placed on the table lamps, playing a local lighting role. There is a class of writing desk lamps for reading and writing, its lampshade brightness, the angle of the lampshade shade luminous body, lighting area and illumination are conducive to reducing visual fatigue and protect vision.

The indoor lamp is embedded in the ceiling, the indoor lamp only emits downward light of general lighting lamps. Interior lights are equipped with various optical components to reduce glare and extend light, such as diffusion shields, prismatic shields or grilles, on their emitting surfaces.

The OA lighting used in office automation lighting is a class of embedded lamps that strictly control the brightness of the light outlet surface in the direction close to the horizontal angle. It makes the lamp on the computer's fluorescent screen image is very light, thus reducing the interference with the content displayed on the screen. The vast majority of embedded lamps have symmetrical light distribution, only a small number of lighting walls or a vertical surface of the lamps, mounted on the adjacent ceiling, emitting asymmetrical light distribution.