What was found
DURING ORIGINATING FLOW FOUND EMERGENCY CABIN LIGHTS OUT ABOVE L1 DOOR AND THREE CEILING EMERGANCY LIGHTS FROM ROWS 1-7 OF THE CABIN THERE IS ALSO AN EICAS EMERG LT BATT FAULT PRESENT WHEN EMERGENCY LIGHTS ARE ON REMOVED FROM SERVICE. FERRIED FOR REPAIRS. REMOVED AND REPLACED #2 ELPU IAW E175 AMM 33-50-01-000-801-A & 33-50-01-400-801A REMOVED AND REPLACED #2 ELPU BATT IAW E175 AMM 33-50-01-000-802A & 33-50-01-400-802A OPS CHECKS GOOD NO FAULTS NOTED. RETURNED TO SERVICE.