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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 ]
Thorn Lighting Ltd, a subsidiary of the Zumtobel Group, is a global supplier of both outdoor and indoor luminaires and integrated controls.. Thorn was founded when Sir Jules Thorn started The Electric Lamp Service Company Ltd, in 1928, dealing in incandescent filament lamps.
The spectrum of light emitted from a fluorescent lamp is the combination of light directly emitted by the mercury vapor, and light emitted by the phosphorescent coating. The spectral lines from the mercury emission and the phosphorescence effect give a combined spectral distribution of light that is different from those produced by incandescent ...
The design was initiated by the U.S. EPA and the Lighting Research Center in 2004, in order to facilitate the deployment of compact fluorescent light bulbs with replaceable ballasts. [ 1 ] The GU24 fitting is compliant with a 2008 ruling by the California Energy Commission under Title 24 ( California Building Standards Code ) to require high ...
The report claimed that due to outdoor lighting and air conditioning use in summer months, there is a net cost saving from changing to compact fluorescent lighting in all climates. [166] The cost of CFL and LED bulbs has decreased greatly since 2008, which shortens the time needed to pay off their initial cost.
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The potato wedges have a tempura batter that fries up light and crisp to create a bite that's almost like eating a doughnut, but the savory mayo balances out the sweetness," says Deputy Editor ...
MicroStrategy stock climbed Monday higher as investors cheered the firm's addition to the Nasdaq 100.. The addition means more ETFs will start buying the stock, including the popular QQQ fund ...