As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALMOST ALL EMERGENCY LIGHTS INOP. AFTER HAVING AIRCRAFT POWER ON FOR OVER TWO HOURS, NO HELP. GROUNDED - YES. CHANGED EMERGENCY LIGHT BATTERY AT FLOOR LEVEL ROW 7 -LH & RH, AND BATTERY AT OVERHEAD BY L-1 DOOR, OPS CHECK GOOD IAW T/C 78233008, STILL SEVERAL MORE INOP. REPLACED ALL INOP EMERGENCY LIGHT BATTERY PACKS, EMERGENCY LIGHTS SYSTEM OPS CHECK GOOD IAW B737-800 AMM 33-51-00-720-801.