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Edward F. Caldwell, a portrait painter originally from Waterville, New York, became part of an active community of designers in New York City during the early 1880s.By the end of that decade and into the 1890s, Caldwell worked for, and later became chief designer and vice president of, the Archer & Pancoast Manufacturing Company of New York, top designers of gas lighting fixtures.
In 2016, Aputure created the Lightstorm series, their first studio-grade line of lighting fixtures. [4] By 2017, they introduced their flagship lights—the Lightstorm 120d and Lightstorm 300d. [ 5 ] The Lightstorm 300d has won several awards such as “Best in Show” at major trade shows like NAB.
A sticker that is half-red and half-white indicates a pulse start metal halide lamp (PSMH). Green is also used on HPS units in Canada. Gray indicates that the fixture is of an LED type. In addition to being colour-coded, newer NEMA stickers also state the lamp type abbreviation just below the lamp's wattage (e.g. HPS, LED).
Usage includes theatrical lighting, locomotive headlamps, aircraft landing lights, and residential and commercial recessed lights ("cans" in the United States). Many PAR lamps are of the sealed beam variety, with a parabolic reflector , one or more filaments , and a glass or plastic lens sealed permanently together as a unit.
Thorn Lighting Ltd, a subsidiary of the Zumtobel Group, is a global supplier of both outdoor and indoor luminaires and integrated controls.. Thorn was founded when Sir Jules Thorn started The Electric Lamp Service Company Ltd, in 1928, dealing in incandescent filament lamps.
A fixture using replaceable light sources can also have its efficiency quoted as the percentage of light passed from the "bulb" to the surroundings. The more transparent the lighting fixtures are, the higher efficacy. Shading the light will normally decrease efficacy but increase the directionality and the visual comfort probability.