DURO-TEST PREPARING NEW LIGHT BULB - The New York Times
Nov 24, 1981 · An ordinary 100-watt incandescent light bulb, during its 750-hour life span, gives off 90 percent of its energy as heat and only 10 percent as light. Duro-Test says its new bulb …
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‘WattSaver’ Light Bulb Introduced By Duro‐Test - The New York …
1 week from now
Jun 26, 1973 · Duro‐Test Corp introduces June 25 new light bulb, WattSaver, that consumes up to 10% less watts of elec power yet provides same amt of light as conventional bulbs; pres G …
nytimes.com
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A Professor Takes On A Takeover - The New York Times
1 week from now
Apr 30, 1988 · Duro-Test has about 5 percent of the $1 billion American light bulb market, and its bulbs are filling sockets at the United Nations, the Kennedy Center in Washington, and even in …
nytimes.com
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