A boron-containing phosphor comprises a material having a formula of AD1-xEuxB9O16,
wherein A is an element selected from the group consisting of Ba, Sr, Ca, Mg, and
combinations thereof; D is at least an element selected from the group consisting
of rare-earth metals other than europium; and x is in the range from about 0.005
to about 0.5. The phosphor is used in a blend with other phosphors in a light source
for generating visible light with a high color rendering index.
