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Diagram of a high-pressure sodium lamp A high-pressure sodium lamp, Philips Master SDW-T 100W. Various types of chemistry are used in the arc tubes of HID lamps, depending on the desired characteristics of light intensity, correlated color temperature, color rendering index (CRI), energy efficiency, and lifespan.
Krypton, which is more advantageous than argon due to its higher atomic weight and lower thermal conductivity (which also allows use of smaller bulbs), but its use is hindered by much higher cost, confining it mostly to smaller-size bulbs. Krypton mixed with xenon, where xenon improves the gas properties further due to its higher atomic weight ...
Imre Bródy (1891, Gyula, Hungary [1] –1944, Mühldorf) was a Hungarian physicist who invented in 1930 the krypton-filled fluorescent lamps (also known as the krypton electric bulb), [2] with fellow-Hungarian inventors Emil Theisz, Ferenc Kőrösy and Tivadar Millner.
Krypton's multiple emission lines make ionized krypton gas discharges appear whitish, which in turn makes krypton-based bulbs useful in photography as a white light source. Krypton is used in some photographic flashes for high speed photography. Krypton gas is also combined with mercury to make luminous signs that glow with a bright greenish ...
To reduce unintentional ultraviolet (UV) exposure, and to contain hot bulb fragments in the event of explosive bulb failure, general-purpose lamps usually have a UV-absorbing glass filter over or around the bulb. Alternatively, lamp bulbs may be doped or coated to filter out the UV radiation. With adequate filtering, a halogen lamp exposes ...
Originally Maglite flashlights used krypton or xenon incandescent bulbs. Current models have LEDs , although the older models are still widely available. Accessories include belt holsters, mounting brackets, colored and glass lenses, attachable fiber optics extensions to bend light output into a cramped space, higher-powered incandescent bulbs ...