UL Listed for 2-Hour Fire Resistance to meet and exceed strict fire safety codes. Integrated Non-combustible insulation acts as a sound barrier minimizing sound transfer between floors. Optional 90 minutes, 120/277 VAC, 60Hz, Emergency Backup. Meets Title 24 requirements. Flicker-Free Dimming. USA designed and assembled. Limited 5 year warranty. For use with ELCO Cedar™ System 6" LED Light Engines. 2 at the end of the item number denotes Generation 2. Please note Gen 2 and Gen 1 are not cross compatible.