A phosphor comprises an oxide that comprises: at least an element selected from the group consisting of phosphorus and boron; at least a metal selected from the group consisting of {HEAD ~ elements} of {TAIL ~ Group IIIA}, elements of Group IVA, and elements of the lanthanide series; which oxide is co activated with Ce3+ and Tb3+ 
A phosphor comprises an oxide that comprises : at least an element selected from the group consisting of phosphorus and boron ; at least a metal selected from the group consisting of { HEAD ~ elements } of { TAIL ~ Group IIIA } , elements of Group IVA , and elements of the lanthanide series ; which oxide is co activated with Ce3 + and Tb3 +
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