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The Lamplighter School [1] was founded in 1953 in a North Dallas farmhouse by Natalie Murray and Marieta "Sandy" Swain on what is now the Cooper Clinic campus. [2] In 1969, The Lamplighter School moved to 11611 Inwood Road.
The Canadian federal government banned the import and sale of 75- and 100-watt incandescent bulbs, effective 1 January 2014. On 1 January 2015, 40- and 60-watt bulbs were also banned, although there are exceptions for oven lights, decorative lamps (light bulbs), appliance bulbs, 3-way fixtures, chandeliers and rough service/utility bulbs. [86]
The Phoebus cartel was an international cartel that controlled the manufacture and sale of incandescent light bulbs in much of Europe and North America between 1925 and 1939. The cartel took over market territories and lowered the useful life of such bulbs, which is commonly cited as an example of planned obsolescence .
Flat-wick lamps have the lowest light output, center-draft round-wick lamps have three to four times the output of flat-wick lamps, and pressurized lamps have higher output yet; the range is from 8 to 100 lumens. A kerosene lamp producing 37 lumens for 4 hours per day for a month (120 hours) consumes about 3 litres (6.3 US pt; 5.3 imp pt) of ...
Or if you're curious about one of our region's many oddities, submit your question via email to BAddison@gannett.com with "Weird West Texas" in the subject line or via text at 806.496.4073
These lamps are used for fluorescence effects where less visible light is ideal. 09 N/A Sun-tanning lamps: These lamps produce wide or narrow band UV-B radiation 10 BL Black-Light lamps: Black light lamps give off long-wave UV-A radiation of around 350-400 nm. They are often used to attract insects to traps.