DMF Lighting 4" Adjustable 2500 Lumen Commercial Downlight (27.5W)The DMF Lighting 4" Commercial Adjustable Downlight is the newest innovation in high bay fixtures. Previously, they had the DCD series; now, theyre called Commercial Downlights. Despite the name change, they are still made for the same application. This light specifically has an adjustable head so you can be very intentional about your lighting setup. That being spaces with tall ceilings. Meanwhile, the M Series Residential lights (DRD2) cap out at