FLUORESCENT COMPOSITION FOR A LOW-PRESSURE DISCHARGE LAMP HAVING A VERY HIGH COLOR TEMPERATURE

摘要

Disclosed is a fluorescent composition for a low-pressure discharge lamp having great light efficiency and a high color temperature. Said fluorescent composition contains fluorescent materials emitting in the red wavelength range from the group comprising europium-doped yttrium oxide and cerium-doped and manganese-doped gadolinium zinc magnesium pentaborate, fluorescent materials emitting in the green wavelength range from the group comprising cerium-doped and terbium-doped lanthanum phosphate and/or terbium-doped cerium magnesium aluminate and/or terbium-doped cerium magnesium pentaborate, as well as an optional fluorescent material of the type europium-doped barium magnesium aluminate, which emits in the blue wavelength range. The invention is characterized in that the fluorescent composition additionally contains at least one fluorescent material emitting in the blue or blue-green wavelength range from the group comprising manganese-doped and europium-doped manganese strontium barium magnesium aluminate or europium-doped and manganese-doped barium magnesium aluminate, europium-doped strontium aluminate, europium-doped strontium barium calcium chloroapatite, and europium-doped strontium borophosphate.