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There are three ways to improve the amount of light available from a window: [4] (a) placing the window close to a light colored wall, (b) slanting the sides of window openings so the inner opening is larger than the outer opening, or (c) using a large light colored window-sill to project light into the room.
In optics, a diffuser (also called a light diffuser or optical diffuser) is any material that diffuses or scatters light in some manner to transmit soft light.Diffused light can be easily obtained by reflecting light from a white surface, while more compact diffusers may use translucent material, including ground glass, teflon, opal glass, and greyed glass.
Batten luminaires are typically cheap and meant to be fixed directly to structural battens in loft spaces or to ceilings and soffits in back-of-house areas where aesthetic value is not required. Fluorescent fittings may include a low-specification diffuser cover, or simply have the fluorescent tube exposed.
The history of electric light is well documented, [11] and with the developments in lighting technology the profession of lighting developed alongside it. The development of high-efficiency, low-cost fluorescent lamps led to a reliance on electric light and a uniform blanket approach to lighting, but the energy crisis of the 1970s required more design consideration and reinvigorated the use of ...
Since they can reflect light deeper into a space, the use of incandescent and fluorescent lighting can be reduced or eliminated, depending on the space. Light shelves make it possible for daylight to penetrate the space up to 2.5 times the distance between the floor and the top of the window.
The 3M company developed a system based on optical lighting film [36] and developed the 3M light pipe, [37] which is a light guide designed to distribute light uniformly over its length, with a thin film incorporating microscopic prisms, [26] which has been marketed in connection with artificial light sources, e.g. sulfur lamps.
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Polluting light is often wasted light involving unnecessary energy costs and carbon dioxide emissions. Light pollution is described as artificial light that is excessive or intrudes where it is not wanted. Well-designed lighting sends light only where it is needed without scattering it elsewhere. Poorly designed lighting can also compromise safety.