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A high-pressure sodium street light in Toronto A high-pressure sodium-vapor lamp An HPS lamp that isn't entirely off. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure, and high pressure.
Diagram of a high-pressure sodium lamp A high-pressure sodium lamp, Philips Master SDW-T 100W. Various types of chemistry are used in the arc tubes of HID lamps, depending on the desired characteristics of light intensity, correlated color temperature, color rendering index (CRI), energy efficiency, and lifespan.
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]
A wind gust of 173 mph (278 km/h) was recorded on a tower in Punta Gorda. Orlando recorded a wind gust of 105 mph (170 km/h). The winds damaged or destroyed thousands of homes, knocked down tens of thousands of trees, and left more than 2 million Floridians without power. Charley also spawned nine tornadoes across the state.
The South Florida Water Management District (SFWMD) is a regional governmental district that oversees water resources from Orlando to the Florida Keys.The mission of the SFWMD is to manage and protect water resources by balancing and improving water quality, flood control, natural systems, and water supply, covering 16 counties in Central and Southern Florida.
The family of Huw Edwards are receiving crisis management advice from former News of the World editor Andy Coulson, it has been reported. David Cameron’s former Downing Street communications ...