How to know the quality of LED Street Light

High-efficiency 145-158Lm/w ,
Cost-saving: after service and repair cost saving.
Tool-free and repair from the pole immediately.
Self-Cleaning capability: Suitable for many areas include the hazardous environment, like sands, dust, oil, high air pollution area,
IP66, IK08, CE,RoHS, UL ,CUL,IEC certificates