we are oem manufacturer and exporter of wide range of emergency lights like emergency lamp ,emergency tubes, etc Emergency lamp 9w operation voltage 100-400v surge protection. 4kv 440v Lithium battery. 3.7v and 2200mah Charging time. 8hrs Backup time. 4hrs warranty. 12months Life cycles of battery. 550 Ac lumens. 900 Emergency lumens. 400