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The most common type of floodlight was the metal-halide lamp, which emits a bright white light (typically 75–100 lumens/Watt). Sodium-vapor lamps are also commonly used for sporting events, as they have a very high lumen to watt ratio (typically 80–140 lumens/Watt), making them a cost-effective choice when certain lux levels must be provided. [4]
HID lamps are typically used when high levels of light over large areas are required, and when energy efficiency and/or light intensity are desired. These areas include gymnasiums, large public areas, warehouses, movie theatres, football stadiums, [9] outdoor activity areas, roadways, parking lots, and pathways. More recently, HID lamps have ...
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]
Wildfires began breaking out in Southern California Tuesday morning as a life-threatening, widespread windstorm that could be one of the most destructive to hit the region in over a decade roars ...
Dorothy Bagley was diagnosed with dementia in 2021, after showing early signs in 2016. Though her memory faded, Bagley was able to recognize her husband, Merv Bagley, and say their signature, call ...
Joy Bauer shares three healthy. comforting holiday recipes: 3-ingredient chocolate cookies, slow-cooker Italian-style meatballs and butternut squash soup.
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