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Lighting or illumination is the conscious use of light to achieve a practical or aesthetic effect. Lighting includes the use of both artificial light sources, such as lamps and lighting, and natural lighting by capturing daylight. Daylight (using windows, dormers or light shelves) is sometimes used as the main source of daylight in buildings. This can save energy instead of artificial lighting, which is the main component of energy consumption in buildings. Proper lighting can improve the performance of tasks, improve the appearance of the area or have a positive psychological effect on occupants.

Interior lighting is usually done through lighting fixtures and is a key element of interior design. Lighting can also be an integral part of landscape projects.

Lighting devices are available in a variety of styles for various functions. The most important functions are the light source holder to provide focused light and prevent visual traces. Some of them are very clear and functional, some of them are works of art. Almost any material can be used as long as it can withstand excessive heat and adhere to safety codes.

An important property of light fixtures is the efficiency of light or wall efficiency, which means the amount of useful light emitted by energy utility, usually measured in lumen watt. A fixture using interchangeable light sources may also have an efficiency indicated as the percentage of light passing from the “bulb” in close proximity. The more transparent the light, the higher the efficiency. Shading of light usually reduces effectiveness, but increases the likelihood of direction and visual comfort.

The color temperature of the white light sources also affects their use for certain applications. The color temperature of the white light source is the temperature in the kelvins of the theoretical blackbody radiator, which most closely matches the spectral characteristics of the lamp.

The incandescent lamp has a color temperature of about 2800-3000 kelvins; daylight is about 6,400 kelvins. Lower temperature temperature lamps have a relatively large energy in the yellow and red parts of the visible spectrum, and high color temperatures correspond to the colors of the green-white type. For tasks of critical control or color matching or retail display of food and clothing, the color temperature of the lamps will be selected for a better overall lighting effect.
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