Experience the change, see the difference Maximize visual appeal by three beam spreads options to give the right distribution and light output;Ultimate user comfort by providing 50 degree physical and 45 degree reflected cutoff, creating less brightness;Uniform light and color consistency at an SDCM of 2;Modular three piece design that makes servicing and upgrading convenient;Installation efficiency accomplished by a tool-free install and quick connect technology Calculite 4" Round Gen3 features industry leading visual comfort, excellent uniform illumination over time, and patented installation flexibility. L90 (90% lumen maintenance) up to 60,000 hrs. and efficacies as high as 115 lm/W;Construction: Lowest plenum height with plug & play connector between frame and light engine;Narrow, Medium, Wide beam options in all lumen packages;Dimming options: Standard dimming to 1% for 0-10V, Lutron, and Dali;Flange options available: Polished, white, or flangeless Residential;Office;Banks;Hospitality;Airports;Fashion