As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OPS TEST OF CABIN EMERGENCY LIGHTING FAILED. GROUNDED - YES. PERFORMED INTERFACE/POWER UP TEST OF THE CIDS AND OPERATIONAL CHECK OF THE EPSU THRU BITE CHECK AND OPS TEST OF THE EMERGENCY LIGHTING IN CABIN IAW A320 AMM 31-51-00-710-008-A, 23-73-00-740-005-B AND TSM 33-51-00-810-834-A. ALL TESTS GOOD.