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Light tubes (also known as solar pipes, tubular skylights or sun tunnels [1]) are structures that transmit or distribute natural or artificial light for the purpose of illumination and are examples of optical waveguides. In their application to daylighting, they are also often called tubular daylighting devices, sun pipes, sun scopes, or ...
Skylights are widely used in daylighting design in residential and commercial buildings, mainly because they are the most effective source of daylight on a unit area basis. An alternative to a skylight is a roof lantern. A roof lantern is a daylighting cupola that sits above a roof, as opposed to a skylight which is fitted into a roof's ...
Skylight in the vault in the Chapel of the Constable of the Burgos Cathedral, a glazed closed skylight from the 15th century A skylight (sometimes called a rooflight ) is a light-permitting structure or window, usually made of transparent or translucent glass, [ 1 ] that forms all or part of the roof space of a building for daylighting and ...
Skylight of a lava tube, a hole in the ceiling of the tube; Skylight 1A, a photographic filter factor that absorbs ultraviolet radiation; Lenovo Skylight, a cancelled project for a small portable computer with mobile telephone
A roof window is an outward opening window that is incorporated as part of the design of a roof. Often confused with a skylight , a roof window differs in a few basic ways. [ citation needed ] A roof window is often a good option when there is a desire to allow both light and fresh air into the space.
Modern clerestories often are defined as vertical windows, located on high walls, extending up from the roofline, designed to allow light and breezes into a space, without compromising privacy. Factory buildings often are built with clerestory windows; modern housing designs sometimes include them as well.
The dominant radiative scattering processes in the atmosphere are Rayleigh scattering and Mie scattering; they are elastic, meaning that a photon of light can be deviated from its path without being absorbed and without changing wavelength. Under an overcast sky, there is no direct sunlight, and all light results from diffused skylight radiation.
Mexico City at night, showing skyglow A map from 1996 to 1997 showing the extent of skyglow over Europe. Skyglow (or sky glow) is the diffuse luminance of the night sky, apart from discrete light sources such as the Moon and visible individual stars.