The 1X4 Air 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. It is no flicker ,reaching up to 100lm/w, both step dimming and o-10v dimming available.with maximum 7 years warranty.