19" x 14-1/2". Metalux, Compact LED High Bay Ceiling Light Fixture, 17,000 Lumens, 4000K Color Temperature, Universal Voltage, 0-10V Dimming Driver, High Impact Polycarbonate Lens, Ideally Suited For Suspension Mounting With Included V-Hangers, Cable/Monopoint Mounting Options Available, CULus Listed, 5 Year Warranty.