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The size of a round PAR lamp is expressed as the nominal diameter of the mouth of the reflector, in eighths of an inch—so the approximate nominal lamp bell diameter in inches can be found by dividing the PAR size by 8. A PAR56, for example, is 56 eighths of an inch (7 inches) in diameter; a PAR36 is 36 eighths (4.5 inches) in diameter, and so on.
A foot-candle (sometimes foot candle; abbreviated fc, lm/ft 2, or sometimes ft-c) is a non-SI unit of illuminance or light intensity. The foot-candle is defined as one lumen per square foot. This unit is commonly used in lighting layouts in parts of the world where United States customary units are used, mainly the United States. [ 1 ]
A 3.1-metre (10 ft) secondary mirror is to produce an unobstructed field-of-view of 20 arcminutes in diameter with a focal ratio of 15. A 3.5-by-2.5-meter (11.5 ft × 8.2 ft) flat tertiary mirror is to direct the light path to science instruments mounted on large Nasmyth platforms. [57] [58] The telescope is to have an alt-azimuth mount. [59]
Oak Island Lighthouse. Built in 1957-58 by Brinkley, W.F. & Son Construction Co. located in Granite Quarry NC at a cost of $110,000, it was one of the last lighthouses constructed in the US. It rests on 24 pilings driven 67' deep to bedrock which are 10" round, filled with concrete and capped by a 30' wide by 3' deep octagonal concrete base.
An experimental nasal spray has helped clear toxic protein buildups in the brains of mouse models of Alzheimer's. Its developers believe the spray may help delay Alzheimer's by at least a decade.
Time: 7:30 p.m. | TV: ESPN | Line: Texas A&M -2.5 | Total: 46.5. Maybe this is the week that Auburn puts a complete game together against a good SEC opponent. Oddsmakers certainly think there’s ...
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