The thinnest surface mounted 2X4 led flat panel light is integrated with suspending, recessed, surface mounted functions, especially, only 3mm gap between the panel and the dry ceiling if surface mounted installation. The unique internal driver make the panel only 1.09" thickness, which helps you saving shipping cost. It is no flicker ,reaching up to 110lm/w, both step dimming and o-10v dimming available with maximum 7 years warranty,ideal for corporate offices, manufacturing facilities, architectural settings, hotels, hospitals and museums ect.