Light fixture

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This article is about architectural light fixtures. For stage lighting, see Stage lighting instrument.
A few types of light fixtures

A light fixture (US English), light fitting (UK English), or luminaire is an electrical device used to create artificial light by use of an electric lamp. All light fixtures have a fixture body and a light socket to hold the lamp and allow for its replacement. Fixtures may also have a switch to control the light. Fixtures require an electrical connection to a power source; permanent lighting may be directly wired, and moveable lamps have a plug. Light fixtures may also have other features, such as reflectors for directing the light, an aperture (with or without a lens), an outer shell or housing for lamp alignment and protection, and an electrical ballast or power supply. A wide variety of special light fixtures are created for use in the automotive lighting industry, aerospace, marine and medicine.

Portable light fixtures are often called "lamps", as in table lamp or desk lamp. In technical terminology, the lamp is the light source, what is typically called the light bulb.

The term luminaire is recommended by the International Electrotechnical Commission (IEC) for technical use.

History[edit]

Industrial light fixture, designed by Peter Behrens, around 1915

Fixture manufacturing began soon after production of the incandescent light bulb. When practical uses of fluorescent lighting were realized after 1924, the three leading companies to produce various fixtures were Lightolier, Artcraft Fluorescent Lighting Corporation, and Globe Lighting in the United States.[1]

Fixture types[edit]

Light fixtures are classified by how the fixture is installed, the light function or lamp type.

Free-standing or portable[edit]

Tiffany dragonfly desk lamp with pigeon sculptures

Fixed[edit]

  • Recessed light — the protective housing is concealed behind a ceiling or wall, leaving only the fixture itself exposed. The ceiling-mounted version is often called a downlight.
    • "Cans" with a variety of lamps — this term is jargon for inexpensive downlighting products that are recessed into the ceiling, or sometimes for uplights placed on the floor. The name comes from the shape of the housing. The term "pot lights" is often used in Canada and parts of the US.
    • Cove light — recessed into the ceiling in a long box against a wall.
    • Torch lamp, torchière, or floor lamp.
    • Troffer — recessed fluorescent light fixtures, usually rectangular in shape to fit into a drop ceiling grid.
A chandelier light fixture
  • Surface-mounted light — the finished housing is exposed, not flush with surface
    • Chandelier
    • Pendant light — suspended from the ceiling with a chain or pipe
    • Sconce — provide up or down lights; can be used to illuminate artwork, architectural details; commonly used in hallways or as an alternative to overhead lighting.
    • Track lighting fixture — individual fixtures ("track heads") can be positioned anywhere along the track, which provides electric power.
    • Under-cabinet light — mounted below kitchen wall cabinets
    • Ceiling fan - May sometimes have a light, often referred to as a light kit mounted to it.
    • Emergency lighting or exit sign — connected to a battery backup or to an electric circuit that has emergency power if the mains power fails
    • High- and low-bay lighting — typically used for general lighting for industrial buildings and often big-box stores
    • Strip lights or Industrial lighting — often long lines of fluorescent lamps used in a warehouse or factory
A decorative outdoor lamp at Leeds Town Hall.
A garden solar lamp is an example of landscape lighting

Special-purpose lights[edit]

Lamp types[edit]

Lightbulb.jpg
Main article: List of light sources
Xenon arc lamp, Yablochkov candle
Fluorescent lamp, compact fluorescent lamp (CFL), Induction lamp, blacklight.
  • Fuel lamps
Betty lamp, butter lamp, carbide lamp, gas lighting, kerosene lamp, oil lamp, rush light, torch, candle, Limelight, gas mantle
Safety lamps: Davy lamp & Geordie lamp
Mercury-vapor lamp, Metal-halide (HMI, HQI, CDM), Sodium vapor or "high-pressure sodium"
A-lamp, Parabolic aluminized reflector lamp (PAR), reflector lamp (R), bulged reflector lamp (BR) (refer to lamp shapes)

Light-fixture controls[edit]

See also[edit]

References[edit]

  1. ^ "Early industry leaders", of fluorescent fixture manufacturing, Paul Levy (1998)

External links[edit]