What was found
ON INITIAL APPROACH WE SELECTED THE GEAR HANDLE TO THE DOWN POSITION TO CONFIGURE FOR LANDING. RECEIVED NOSE & RT MLG INDICATION WITH NO LT MLG LIGHT. THERE WAS NO ASSOCIATED EICAS MESSAGE WITH THE INDICATION. PRESSED LIGHT TEST BUTTON & TAPPED LIGHT, STILL NO LT INDICATION. RAN THROUGH ALL MLG CHECKLIST TO SEE IF ANYTHING HELPED. PRESSED THE TEST BUTTON A SECOND TIME & THE LIGHT BULB IN LT GEAR LENS CAME ON. TAPPED LENS & RIGHT BULB CAME ON. AFTER A LOW APPROACH TO VISUALLY INSPECT GEAR, NORMAL LANDING AND TAXIED TO GATE. EMERGENCY DECLARED. REMOVED AND REPLACED LT GEAR LIGHT ASSY IAW SWPM 20-84 AND CHECKED IAW AMM 32-61-00-5. ACFT OK FOR SERVICE