What was found
DURING MAINT PRE-DEPARTURE CHECKS OF EMERGENCY EXIT LIGHTING, NOTED THAT EXIT LIGHT OVER L1 DOOR IS DIM AND FLICKERING. REMOVED COVER AND SWITCHED LIGHT "ON" IT IS BRIGHT & STEADY. REMOVED LIGHT AND AGAIN, BRIGHT AND STEADY ON BATTERY PACK. WHEN INSTALLED IN THE ACFT THE LIGHTS REVERT TO DIM AND FLICKERING. RESET LIGHT BY SWITCHING FROM "ARM" TO "ON" AND BACK TO "ARM" AGAIN NO HELP. R & R EXIT LIGHT IAW MM 33-50-001-2. OP CHECK NORMAL. R/I FROM FACT PREMATURE REMOVAL/INSTALLATION. AWAITING TDR RESULTS.