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VELUX is a Danish manufacturing company that specialises in roof windows, skylights, sun tunnels and related accessories. The company is headquartered in Hørsholm , Denmark and is a part of VKR Holding A/S. VELUX Group is a founding partner of the global Active House Alliance.
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 ...
Download as PDF; Printable version; ... one of the four official Danish central bank rates, was lowered to −0.75%. ... Velux (windows and skylights production, ...
Total external reflection, hollow light tube Total internal reflection, block of acrylic. 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.
Moreover, the size of the grain boundaries scales directly with particle size. Thus, a reduction of the original particle size well below the wavelength of visible light (about 1/15 of the light wavelength, or roughly 600 nm / 15 = 40 nm ) eliminates much of the light scattering, resulting in a translucent or even transparent material.
In architecture, a lightwell, [NB 1] sky-well, [NB 2] or air shaft is an unroofed or roofed external space provided within the volume of a large building to allow light and air to reach what would otherwise be a dark or unventilated area.