... High lumen,low lumen deprecition,dust protection,leakage protection. Soft light,no flicker,no dark,no shadow,no glare. Safe and ... with high lumen,high efficiency,high CRI and well-distributeed light,bottom-emitting lighting. Ultra thin,beautiful appearance.It is composed ... of PMMA cover,aluminium farame and Optical light guide plate etc. Stable performance,good heat dissipation. Easy ...