Available in 1' x 4', 2' x 2' and 2' x 4' recessed & surface versions, Fully luminous center panel, Advanced optical control, High performance efficacy up to 139 lumens per watt, Over 59% energy savings when compared to fluorescent troffers, Three CCT options: 3000K, 3500K and 4000K at 80 or 90CRI, VividTune CCT tuning options from 3000K–5000K or 2700K-6500K, Standard 0-10V dimming driver with Step-dim and Fifth Light options, 2x2: L94 at 60,000 hours 2x4: L93 at 60,000 hours with 5 year warranty