Green-emitting phosphors of Sr3 La (PO4)3: Ce3+, Tb3+ have been synthesized by a solid-state reaction. The energy transfer from Ce3+ to Tb3+ is a resonant type via a dipole-dipole mechanism with an energy-transfer critical distance of 7.6 Å. By utilizing the principle of energy transfer and appropriate tuning of activator contents, we have also made an attempt to observe a strong green emission performance displayed by this phosphor for use as a coating material on compact fluorescent lamps (CFLs). The results clearly indicate that the luminous efficiency based on Sr3 (La0.67 Ce0.08 Tb0.25) (PO4)3 was found to be 69 lm/W. The good luminous efficiency and lumen maintenance (2000 h, 91.8%) of the green-emitting CFL demonstrate that this phosphor can be suitable for application on a short UV fluorescent lamp. Additionally, the Sr3 (La0.67 Ce0.08 Tb0.25) (PO4)3 green phosphor has advantages of environmental friendliness and low cost.