Troffer Fixture Retrofit Kit, Lumens 4,000 lm, Lumens Range 4,000 to 5,999 lm, Light Technology LED, 120/277V AC, Lighting Certification Unrated, Dimmable Yes, Emergency Battery Backup No, For Bulb Type Integrated LED, Overall Height 2 1/2 in, Overall Length 45 5/8 in, Overall Width 23 in, Color Rendering Index 80, Color Temperature 3500K, Dimming Method 0-10V, Kit Contents LED Driver, LED Board, Reflector and Bracket, LED Replacement For 2 Lamp T8, Lens Type Curved Lens