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A type of single use underwater lighting source that was in limited use during the 1950s is the magnesium torch, a pyrotechnic device using magnesium metal that could be ignited and would burn underwater. It produced a bright white all-round light, and once activated would continue to burn until exhausted.
A light fixture (US English), light fitting (UK English), or luminaire is an electrical lighting device containing one or more light sources, such as lamps, and all the accessory components required for its operation to provide illumination to the environment. [1] All light fixtures have a fixture body and one or more lamps.
Puck lights are round or oval and are good for cabinet and display lighting. Puck lights can create scallops, spots, or pools of lighting instead of even illumination across the counter top. Linear lights can come as a light strip or as a linear fixture or light bar. Linear fixtures resemble small puck lights on one mounting strip.
A magnesium torch is a bright light source made from magnesium, which can burn underwater and in all weather conditions. They are used for emergency illumination for railroad applications. They were also used in the 1950s up to the early 1970s as a light source for scuba diving, and were featured occasionally in television shows. A relay of ...
In this video, dozens of 15-18 inch speckled trout are attracted to a 1000 W green light mounted on a pier. A fishing light attractor is a fishing aid that uses lights attached to a structure above water or suspended underwater to attract fish and members of their food chain.
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.