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In the 1970s, Thorn Lighting introduced an energy-saving 8 ft retrofit tube in Europe. Designed to run on the existing 125 W (240 V) series ballast but with a different gas fill and operating voltage, the tube operated at only 100 W. Increased efficiency meant that the tube produced only 9% lumen reduction for a 20% power reduction. [7]
Hayward is a city located in Alameda County, California, United States, in the East Bay subregion of the San Francisco Bay Area. With a population of 162,954 as of 2020, [10] Hayward is the sixth largest city in the Bay Area, and the third largest in Alameda County. [12] Hayward was ranked as the 36th most populous municipality in California.
Hayward Executive Airport at City of Hayward website "Hayward Executive Airport Master Plan, 2002" (PDF). Archived from the original (PDF) on 2012-06-30. History of Hayward Airport Archived 2011-07-26 at the Wayback Machine from Hayward Airport Noise website; Aerial image as of February 2004 [permanent dead link ] from USGS The National Map
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Bulbs used for headlamps, turn signals and brake lamps may be required to comply with international and national regulations governing the types of lamps used. Other automotive lighting applications such as auxiliary lamps or interior lighting may not be regulated, but common types are used by many automotive manufacturers.
Photographic emulsion film does not respond to lighting color identically to the human retina or visual perception. An object that appears to the observer to be white may turn out to be very blue or orange in a photograph. The color balance may need to be corrected during printing to achieve a neutral color print. The extent of this correction ...
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Founded in 1892, Hayward High is one of the oldest high schools in the San Francisco Bay Area. The first true high school that opened in 1893 was called Union High School #3. It served students from Hayward, Castro Valley, San Lorenzo, Redwood, Palomares, and Stonybrook. Initially, it was a one-story building with a basement.