Outdoor Lighting

For other uses, see lighting disambiguation .Low-intensity lighting and haze in a concert hall allows laser effects to be visible.Lighting or illumination is the deliberate application of light to achieve some practical or aesthetic effect.Lighting includes the use of both artificial light sources such as lamps and light fixtures, as well as natural illumination by capturing daylight.Daylighting using windows, skylights, or light shelves is often used as the main source of light during daytime in buildings.This can save energy compared with artificial lighting, which represents a major component of energy consumption in buildings.Proper lighting can enhance task performance, improve the appearance of an area, and have positive psychological effects on occupants.Indoor lighting is usually accomplished using light fixtures , and is a key part of interior design.Lighting can also be an intrinsic component of landscape projects.Light fixture Lighting fixtures come in a wide variety of styles for various functions.The more transparent the lighting fixture is, the higher efficacy.For critical inspection or color matching tasks, or for retail displays of food and clothing, the color temperature of the lamps will be selected for the best overall lighting effect edit .A demonstration of the effects of different kinds of lighting.Lighting is classified by intended use as general, accent, or task lighting, depending largely on the distribution of the light produced by the fixture.Task lighting is mainly functional and is usually the most concentrated, for purposes such as reading or inspection of materials.

Accent lighting is mainly decorative, intended to highlight pictures , plants , or other elements of interior design or landscaping.General lighting sometimes referred to as ambient light fills in between the two and is intended for general illumination of an area.Methods Downlighting is most common, with fixtures on or recessed in the ceiling casting light downward.Uplighting is less common, often used to bounce indirect light off the ceiling and back down.It is commonly used in lighting applications that require minimal glare and uniform general illuminance levels.Uplighting indirect uses a diffuse surface to reflect light in a space and can minimize disabling glare on computer displays and other dark glossy surfaces.However indirect lighting is completely reliant upon the reflectance value of the surface.Front lighting is also quite common, but tends to make the subject look flat as its casts almost no visible shadows.Lighting from the side is the less common, as it tends to produce glare near eye level.Backlighting either around or through an object is mainly for accent.Forms of lighting include alcove lighting, which like most other uplighting is indirect.Soffit or close to wall lighting can be general or a decorative wall-wash, sometimes used to bring out texture like stucco or plaster on a wall, though this may also show its defects as well.The effect depends heavily on the exact type of lighting source used.Recessed lighting often called “pot lights” in.Lightolier , was popular at one point because it was much easier to install than recessed lighting, and individual fixtures are decorative and can be easily aimed at a wall.A modified version of this is cable lighting , where lights are hung from or clipped to bare metal cables under tension.A torchiere is an uplight intended for ambient lighting.

The standard lamp and shade that sits on a table is general lighting, while the desk lamp is considered task lighting.This uses diffuser panels hung like a suspended ceiling below fluorescent lights, and is considered general lighting.This would probably fall under accent lighting, though in a dark nightclub it could be considered general lighting.Floodlights are used to illuminate outdoor playing fields or work zones during nighttime.Floodlights can be used to illuminate outdoor playing fields or work zones during nighttime hours.Underwater accent lighting is also used for koi ponds, fountains, swimming pools and the like edit .While lamps have traditionally been rated and marketed primarily in terms of their power consumption, expressed in watts , proliferation of lighting technology beyond the incandescent light bulb has eliminated the correspondence of wattage to the amount of light produced.Architectural lighting design Main article:.Lighting design as it applies to the built environment, also known as ‘architectural lighting design’, is both a science and an art.Lighting of structures must consider aesthetic elements as well as practical considerations of quantity of light required, occupants of the structure, energy efficiency and cost.For simple installations, hand-calculations based on tabular data can be used to provide an acceptable lighting design.In some design instances, materials used on walls and furniture play a key role in the lighting effect.In addition to paint, reflective surfaces also have an effect on lighting design.Photometric studies Photometric studies also sometimes referred to as “layouts” or “point by points” are often used to simulate lighting designs for projects before they are built or renovated.

 

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