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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
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The bulb was officially listed in the Guinness Book of World Records as "the most durable light" in 1972, replacing the Palace Theater Light in Fort Worth, Texas. The bulb was listed in the book for the next 16 editions. It was not listed during 1988–2006, without a reason being given, before returning in 2007. [16]
The fourth-longest-lasting light bulb was above the back door of Gasnick Supply, a New York City hardware store on Second Avenue, between 52nd and 53rd Streets. It was installed in 1912 (113 years ago) (), according to store owner Jack Gasnick. Apparently Gasnick tried several times to discredit the Centennial Light in Livermore.
The provincial government of Nova Scotia stated in February 2007 that it would like to move towards preventing the sale of incandescent light bulbs in the province. [77] In April 2007, Ontario's minister of energy, Dwight Duncan, announced the provincial government's intention to ban the sale of incandescent light bulbs by 2012. [78]
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.