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A few underwater lights have a focusing facility by which the beam angle can be adjusted. There are two ways this can be done, depending on the basic emission pattern of the light source. HID lights, which generally produce non-directional light, are usually focused by a reflector, which can be slid longitudinally over the light.
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.
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.
For voltages ≥ 12 kV the conductors are round so that the insulation is exposed to a uniform electric field gradient. The conductor can be stranded from individual round wires or can be a single solid wire. In some designs, profiled wires (keystone wires) are laid up to form a round conductor with very small interstices between the wires.
Fountains built in the United States between 1900 and 1950 mostly followed European models and classical styles. For example: The handsome Samuel Francis Dupont Memorial Fountain (aka Dupont Circle Fountain), in Dupont Circle, Washington D.C., was designed and created by Henry Bacon and Daniel Chester French, the architect and sculptor of the Lincoln Memorial, in 1921, in a pure neoclassical ...
Like other gas-discharge lamps such as the very-similar mercury-vapor lamps, metal-halide lamps produce light by ionizing a mixture of gases in an electric arc.In a metal-halide lamp, the compact arc tube contains a mixture of argon or xenon, mercury, and a variety of metal halides, such as sodium iodide and scandium iodide. [7]
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