What was found
UPON LOWERING LG, FOUND LT MLG GREEN LIGHTS INOPERATIVE, BOTH LOWER GREEN LIGHTS. PROCEEDED WITH GEAR DOWN LOW APPROACH WHILE TOWER CONFIRMED THAT GEAR APPEARED DOWN. REPLACED ONE BULB AFTER LOWER APPROACH & GO AROUND. GEAR GREEN LIGHT FOUND OPERATING. ATC DECLARED EMER. THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. RELAMPED LT MLG POSITION INDICATOR, TESTED GOOD IAW AMM 32-60-03. THE ACFT WAS NOT GNDED.