Light fixture
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A light fixture (US English), light fitting (UK English), or luminaire is an electrical lighting device containing one or more light sources, such as
Fixtures may also have a switch to control the light, either attached to the lamp body or attached to the power cable. Permanent light fixtures, such as dining room chandeliers, may have no switch on the fixture itself, but rely on a wall switch.
Fixtures require an
Light fixtures may also have other features, such as
Portable light fixtures are often called lamps, as in table lamp or desk lamp. In
History
Fixture manufacturing began soon after production of the incandescent light bulb.[citation needed] 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.[5]
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Neoclassical light fixture; mid-19th century; bronze; height: 18 cm; Hallwyl Museum (Stockholm, Sweden)
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Lamp; 1902–1918; lead and glass; 67.9 x 52.1 cm; Metropolitan Museum of Art (New York City)
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"Daffodil" lamp; 1904–1924; leaded opalescent glass and gilt bronze; height: 67.9 cm, diameter of shape: 51.4 cm; Metropolitan Museum of Art
Fixture types
Light fixtures are classified by how the fixture is installed, the light function or lamp type.
Free-standing or portable
- Table lamp fixtures, standard lamp fixtures, and office task light luminaires.
- Balanced-arm lamp is a spot light with an adjustable arm such as anglepoise, RAMUN or Luxo L1.
- Gooseneck (fixture)
- Nightlight
- Floor Lamp
- Torch lamp or torchièresare floor lamps with an upward-facing shade. They provide general lighting to the rest of the room.
- Gooseneck lamp
- Torch lamp or
- Bouillotte lamp: see Bouillotte
Fixed
- Ceiling Dome – the light source(s) are hidden behind a translucent dome typically made of glass, with some combination of frosting and surface texturing to diffuse the light. These can be flush-mount fixtures mounted into the ceiling, or semi-flush fixtures separated by a small distance (usually about 3–12").
- Open ceiling dome – the translucent dome is suspended a short distance below the ceiling by a mechanism that is hidden with the exception of a screw-knob or other device appearing on the outer dome face, and pulling this knob releases the dome.
- Enclosed ceiling dome – the translucent dome mates with a ring that is mounted flush with the ceiling.
- 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 downlightingproducts 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– indirect lighting recessed into the ceiling in a long box against a wall.
- Troffer – recessed fluorescent light fixtures, usually rectangular in shape to fit into a drop ceiling grid.
- "Cans" with a variety of lamps – this term is jargon for inexpensive
- Surface-mounted light – the finished housing is exposed, not flush with the 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.
- Display Case or Showcase light – shows merchandise on display within an enclosed case such as jewelry, grocery stores, and chain stores.
- Ceiling fan – may sometimes have a light, often referred to as a light kit mounted to it. Ceiling fans with built-in lights may eliminate the need for separate overhead light fixtures in a room, and light kits can also replace any ceiling-mounted light fixtures that were displaced by the installation of the ceiling fan.
- mains powerfails.
- 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.
- . Outdoor light fixtures can also include forms similar to indoor lighting, such as pendants, flush or close-to-ceiling light fixtures, wall-mounted lanterns and dome lights.
- High-mast, usually pole – or stanchion-mounted – for landscape, roadways, and parking lots.
- Bollard – a type of architectural outdoor lighting that is a short, upright ground-mounted unit typically used to provide cutoff type illumination for egress lighting, to light walkways, steps, or other pathways.
- Solar lamp
- Street light
- Yard light
Special-purpose lights
- Accent light – any directional light that highlights an object or attracts attention to a particular area.
- Background light – for use in video production.
- Blacklight
- Christmas lights – also called fairy lights or twinkle lights and are often used at Christmas and other holidays for decoration.
- Dock light - provides light for boating safety. Typically affixed atop pilings or directly upon the dock floor itself.
- Emergency light – provides minimal light to a building during a power outage.
- Exit sign
- Flood light
- Safelight (for use in a darkroom)
- coal mines)
- Searchlight (for military and advertising use)
- Security lighting
- Step light
- Strobe light
- Task light
- Traffic light
- Theatrical
- Stage lighting instrument
- Intelligent lighting
- Followspot
- Wallwasher
Lamp types
- Fluorescent
- Fuel lamps
- CDM), Sodium vaporor "high-pressure sodium"
- PAR), reflector lamp (R), bulged reflector lamp (BR) (refer to lamp shapes)
- Obsolete types: Nernst glower
- Novelty: Lava lamp
- Special purpose: heat lamp, Globar, gas mantle
- Halogen – special class of incandescent lamps
- Obsolete types:
- Nuclear: self-powered lighting
- Plasma lamp
- LED (solid-state lighting)
Light-fixture controls
There are various types of devices used to manage the amount of light used:[6]
- 3-way 2-circuit switch
- Dimmer (this allows the user to make a light brighter or dimmer, typically using a rotary dial)
- Light switch (often part of the light socket or power cord on portable fixtures)
- Lighting control system
- Motion detector
- Timer
- Touch
- X10 systems
See also
- Architectural lighting design
- Coefficient of utilization
- Flashlight
- History of street lighting in the United States
- Lantern
- Lampshade
- Lightbulb socket
- Lighting designerfor the theater
- Luminous efficacy
- Timeline of lighting technology
- Light pollution
References
- ISBN 9783030757823.
- ^ Editorial staff (2020-06-22). "An Illuminating Guide to the Top 7 Types of Industrial Lighting - California Business Journal". Retrieved 2022-08-29.
- ^ "Lighting Fixtures Selection Guide: Types, Features, Applications | Engineering360". www.globalspec.com. Retrieved 2022-08-29.
- )
- ^ "Early industry leaders", of fluorescent fixture manufacturing, Paul Levy (1998)
- ^ "Lighting Controls". Energy.gov. Retrieved 2022-08-29.
External links
- Look at the Chart and Pick Out the Reflector You Need, Popular Science, February 1919, page 75, Google Books