As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSENGER COMPARTMENT LIGHTING: WHEN SELECTING CABIN EMERGENCY LIGHTS TO ARM, ALL EMER LIGHTS COME ON AS NORMAL. HOWEVER, THE EMER LIGHTS STAY ON IN THE ARMED POSITION AND THEN FLICKER AND STROBE. T/S TO A DISCHARGED FWD EMER BAT ASSY. REMOVED FWD EMER BATT ASSY AND INSTALLED A TESTED ASSY IAW EMB-505 AMM 33-52-01 AND PERFORMED NJA TC-E50-33-1001. ALL OPS CHECKS GOOD.