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However, the bright headlights have given rise to complaints about glare. [10] HID lamps are used in high-performance bicycle headlamps, as well as flashlights and other portable lights, because they produce a great amount of light per unit of power. As the HID lights use less than half the power of an equivalent tungsten-halogen light, a ...
The following is a list of vehicles that feature hidden headlamps (also called pop-up headlights). [1] The vast majority of hidden headlamps are on cars, however, there are a handful of vehicles included in the list that do not fit this category. These include motorcycles, buses and trains.
Formal research found, at best, a small improvement in visual acuity with yellow rather than white headlights, [54] [55] and French automaker Peugeot estimated that white headlamps produce 20 to 30 percent more light—though without explaining why this estimate was larger than the 15% to 18% value measured in formal research—and wanted ...
Beam lights are often built much like the spot in terms of functionality aside from one key difference: beam lights use a wide lens to make an even more extreme beam. A typical spot has a beam angle from 15 to 35 degrees, whereas an average spot has a beam angle of three to seven degrees with some high end companies producing lights with zero ...
In a movie theater, steps in the aisles are usually marked with a row of small lights for convenience and safety, when the film has started and the other lights are off. Traditionally made up of small low wattage, low-voltage lamps in a track or translucent tube, these are rapidly being replaced with LED based versions.
A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance. It has been used as a method of crowd control , which has caused permanent hearing damage , having an extremely high decibel capacity (up to 160 dB measured at one ...
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The small size of halogen lamps permits their use in compact optical systems for projectors and illumination. The small glass envelope may be enclosed in a much larger outer glass bulb, which has a lower temperature, protects the inner bulb from contamination, and makes the bulb mechanically more similar to a conventional lamp. [1]