LED Troffer Retrofit Kit Lumens 4 278 lm Lumens Range 4 000 to 5 999 lm Light Technology LED 120/277V AC Lighting Certification DesignLights Consortium (DLC) Dimmable Yes Emergency Battery Backup No For Bulb Type Integrated LED Overall Height 3 3/4 in Overall Length 48 in Overall Width 22 1/2 in Color Rendering Index 82 Color Temperature 3500K Dimming Range 100 Percent to 1 Percent Kit Contents LED Driver LED Board Reflector and Bracket LED Replacement For 4 Lamp T8