Embodiments of the invention include an infrared-emitting phosphor comprising (La,Gd)3Ga5−x−yAlxSiO14:Cry, where 0≤x≤1 and 0.02≤y≤0.08. In some embodiments, the infrared-emitting phosphor is a calcium gallogermanate material. In some embodiments, the infrared-emitting phosphor is used with a second infrared-emitting phosphor. The second infrared-emitting phosphor is one or more chromium doped garnets of composition Gd3−x1Sc2−x2−yLux1+x2Ga3O12:Cry, where 0.02≤x1≤0.25, 0.05≤x2≤0.3 and 0.04≤y≤0.12.