... Long life span >100000hrs 3.Super brightness 4.4. CE RoHS, patents Solar Street Light (SLD-SL-30) Lingda ... monocrystalline or polycrystalline, conversion efficiency: 15%Light Power30W, individual CREE/Bridgelux LEDs, 4760 lumensPole6m high, made of steel ,hot galvanization, ... and over discharge,with Light Sensor & Timer, including the Digital LED Driver to drive the LED lighting, Protective Rank IP67 ...