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Available in numerous spot and flood beam spreads. Like all light bulbs, the number represents the diameter of the bulb in 1 ⁄ 8 of an inch. Therefore, a PAR 16 is 51 mm (2 in) in diameter, a PAR 20 is 64 mm (2.5 in) in diameter, PAR 30 is 95 mm (3.75 in) and a PAR 38 is 121 mm (4.75 in) in diameter. A package of four 60-watt light bulbs
By 1917, the number of incandescent filament lamps used in street lighting had reached 1,389,000 across the United States, while the number of arc lamps had started to decline. [ 1 ] In 1919, San Francisco introduced tungsten bulbs on Van Ness Avenue , between Vallejo and Market Street , replacing gas mantles and arc lamps. [ 1 ]
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Announced in 2011 China has banned imports and sales of certain incandescent light bulbs since October 2012 to encourage the use of alternative lighting sources such as light-emitting diodes (LEDs), with a 5-year plan of phasing-out incandescent light bulbs over 100 watts starting 1 October 2012, and gradually extend the ban to those over 15 ...
In the 1980s, after watching a salvage operation, Bob Rosenzweig started the reproduction and selling of his faux-antique bulbs. [9] These vintage-style light bulb reproductions were sold mostly to collectors and prop houses, and continued until the turn of the 21st century when new regulations banned low-efficiency lighting in many countries.
Pages in category "Houses on the National Register of Historic Places in Colorado" The following 110 pages are in this category, out of 110 total. This list may not reflect recent changes .
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