... suspended, MountedWarranty 3 years Operating time(hours)Lumen decrease(%)5,0002.410,0005.220,00011.350,00024.5600x600mm led panel light ... >50,000hoursSize600*6000*11mmFrame width18mmInstallation waysbuilt-in installation, suspended, MountedWarranty 3 years Operating time(hours)Lumen decrease(%)5 ... distance between the upper part of the installed light and the ceiling must not be less than 20mm. Please ...