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4 Foot 17 Watt LED Emergency Battery Backup T8 Tube Light (2 Pack) – Green Electrical Supply
Class 1 Div 1 Explosion Proof 4' T8 Light with Emergency Battery Backup
90 Minute Emergency Battery Backup LED T8 Tube 15W 1800LM 5000K with Manual Push Test Button Aleddra LLT-4-EM-T8-G4-15W-50K - - Amazon.com
4 ft. 5000K, 24W LED Batten Luminaire with Dual Motion Sensors and Emergency Backup | Green Lighting Wholesale