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A searchlight (or spotlight) is an apparatus that combines an extremely bright source (traditionally a carbon arc lamp) with a mirrored parabolic reflector to project a powerful beam of light of approximately parallel rays in a particular direction. It is usually constructed so that it can be swiveled about.
The projector is normally set at 90°, although 71° 31' may be used, in relation to the terrain. The projector consists of a 430-watt incandescent bulb set in a weatherproof housing. Inside the housing are two mirrors; the first, above the bulb, reflects the light downwards to the second mirror, that then reflects the light upwards to the ...
Sky Trackers is a 26-part science-based [1] Australian children's television adventure series, and a stand-alone children's television movie of the same name, which feature the adventures of children who live at space-tracking stations in Australia.
Battery power for the 135 kW and 1,200 Amp searchlight was sufficient for about two minutes of operation. [3] The Havoc's own armament was removed from the nose. The radar fitted was the AI Mk.IV , with broad "arrow head" aerials protruding from the both sides of the aircraft nose with additional side-mounted, and upper- and lower-wing mounted ...
A xenon arc lamp is a highly specialized type of gas discharge lamp, an electric light that produces light by passing electricity through ionized xenon gas at high pressure. It produces a bright white light to simulate sunlight , with applications in movie projectors in theaters , in searchlights , and for specialized uses in industry and research.
Alfredo Moser (* 1951 in Itajaí) is a Brazilian mechanic, and the inventor of the solar bottle bulb, known also as the ‘Moser Lamp’, or the PET bottle lamp. [1] [2] His invention led to the creation of the open-source organization Liter of Light, which offers sustainable lighting to families without electricity access in numerous countries worldwide.
Since electric energy they use costs more than the cost of the bulb, general service lamps emphasize efficiency over long operating life. The objective is to minimize the cost of light, not the cost of lamps. [76] Early bulbs had a life of up to 2500 hours, but in 1924 the Phoebus cartel agreed to limit life to 1000 hours. [141]
Soon afterward Major Rookes Crompton led a detachment of the Electrical Engineers Volunteers to South Africa where they operated electric arc lamp S/Ls of his own design, the first use of such equipment by the RE on campaign. They provided a primitive 'artificial moonlight' by reflecting the searchlight beams from clouds.