Standard white fluorescent lamps employing blend

Details Standard white fluorescent lamps employing blend Standard white fluorescent lamps employing blend

H - Electricity

01

J

117/22, 313/81

H01J 61/35 (2006.01) C09K 11/76 (2006.01) C09K 11/77 (2006.01) H01J 61/40 (2006.01) H01J 61/44 (2006.01)

Patent

CA 1149004

- 10 - ABSTRACT OF THE DISCLOSURE A fluorescent lamp having colors similar to standard white can be prepared using two phosphor compositions. A blue emitting phosphor having a peak emission with a speci- fied range and a 50% band width within a specified range is used with specific amounts of a yellow-emitting phosphor having a 50% band width within a specified range and a peak emission within a specified range provide a lamp having the same chromaticity as a standard white lamp with a higher lumer per watt than the standard white lamp. In one embodi- ment the blue emitting component has a second specific peak emission and a specific 50% bandwidth.

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