Copper activated strontium phosphate phosphors

Claim 1

THE COMBINATION WHICH COMPRISES: A POWER-OPERABLE HIGH-PRESSURE MERCURY-VAPOR SOURCE HAVING THE CHARACTERISTIC OF EMITTING BOTH ULTRAVIOLET RADIATIONS AND VISIBLE RADIATIONS NORMALLY DEFICIENT IN BLUE-GREEN AND RED RADIATIONS; A LIGHT-TRANSMITTING ENVELOPE SURROUNDING SAID SOURCE; A COMPOSITE PHOSPHOR COATING CARRIED ON THE INTERIOR SURFACE OF SAID LIGHT-TRANSMITTING ENVELOPE; SAID COMPOSITE PHOSPHOR COMPRISING AT LEAST 10% BY WEIGHT OF A RED-EMITTING PHOSPHOR AND AT LEAST 30% BY WEIGHT OF A BLUE- AND GREEN-EMITTING PHOSPHATE PHOSPOHR; SAID REDEMITTING PHOSPHOR CONSISTING ESSENTIALLY OF MANGANESE-ACTIVATED MAGNESIUM FLUOROGERMANATE; AND SAID BLUE- AND GREEN-EMITTING PHOSPHATE PHOSPHOR HAVING METALLIC ELEMENTS CONSISTING ESSENTIALLY OF STRONTIUM, CUPROUS COPPER ACTIVATOR AND ALUMINUM, A RATIO OF ATOMS OF TOTAL METAL TO ATOMS OF PHOSPHOR IN SAID PHOSPHOR OF FROM 2.7:2 TO 4.0:2, A RATIO OF ATOMS OF ALUMINUM TO ATOMS OF STRONTIUMS IN SAID PHOSPHOR OF FROM 1:1.5 TO 1:16, A RATIO OF ATOMS OF COPPER TO ATOMS OF PHOSPHORUS IN SAID PHOSPHOR OF FROM 0.001:2 TO 0.06:2, AND A RATIO OF ATOMS OF TOTAL METAL TO ATOMS OF PHOSPHORUS IN SAID PHOSPHOR LESS THAN ABOUT 3.4:2 WHEN THE RATIO OF ATOMS OF ALUMINUM TO ATOMS OF STRONTIUM IN SAID PHOSPHOR IS LESS THAN ABOUT 1:3.