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Light transmission efficiency is greatest if the tube is short and straight. In longer, angled, or flexible tubes, part of the light intensity is lost. To minimize losses, a high reflectivity of the tube lining is crucial; manufacturers claim reflectivities of their materials, in the visible range, of up to almost 99.5 percent. [10] [11]
A daytime running lamp (DRL, also daytime running light) is an automotive lighting and bicycle lighting device on the front of a road going motor vehicle or bicycle. [1] It is automatically switched on when the vehicle's handbrake has been pulled down, when the vehicle is in gear , or when the engine is started, emitting white, yellow , or ...
Solar tubes, sun tunnels, or tubular skylights consist of a roof-mounted fixed unit skylight element, condensing sunlight, distributed by a light conveying optic conduit to a light diffusing element. [3] Being small in diameter, they can be used for daylighting smaller spaces such as hallways, and bounce light in darker corners of spaces. TDDs ...
Light beam from road tunnel fixture inclined towards approaching vehicle such that contrast is enhanced of obstacle on road. Counter-beam lighting (German: Gegenstrahlbeleuchtung) is a type of road lighting used mainly in road tunnels, providing best visibility of obstacles on the lane, and thus traffic safety, while reducing light-energy cost.
The human eye's response to light is non-linear, so a more even distribution of the same amount of light makes a room appear brighter. The source of all daylight is the Sun. The proportion of direct to diffuse light impacts the amount and quality of daylight. [1] "Direct sunlight" reaches a site without being scattered within Earth's atmosphere.
A light pillar or ice pillar is an atmospheric optical phenomenon in which a vertical beam of light appears to extend above and/or below a light source. The effect is created by the reflection of light from tiny ice crystals that are suspended in the atmosphere or that compose high-altitude clouds (e.g. cirrostratus or cirrus clouds ). [ 1 ]
Heroes Tunnel is a twin bore tunnel, 1200 feet in length with bores 63 feet center to center, 23-foot roadways flanked by curbs 2 feet 6 inches wide and tile lined side-walls. The side wall contains 1/4-inch in diameter and spaced 4 inches on the center. The pavement in the tunnel extends 50 feet outside of the tunnel walls at each end.
Northbound vehicles along Eastern Distributor are charged the same toll price in either toll point. At the time of opening, the toll price for light vehicles (cars and motorcycles) was A$3.00. [42] In April 2003, the toll price for heavy vehicles (trucks and buses) was A$7.50. [43
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