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1941 - defective phosphor coating of lamps are discarded by inspector

A FLUORESCENT LAMP'S INNER LINING OF PHOSPHORS GETS A CAREFUL INSPECTION

CD 1963074 E&MP 25.011

Electric Lamps

July 1941

By holding the lamp under a strong light, any places where the phosphor coating may be thin or there may be bubbles or pinholes, can easily be seen. All such defective tubes are discarded by this inspector at the Westinghouse Lamp Division, Bloomfield, N.J.


Original Caption by Science Service
Westinghouse



National Museum of American History

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