... extra lens, Super Bright LED(130-140lum/W), Low Light decay: only 4% after using for 10000 hourscontrollerSRS patent Controller ... functions, such as, Anti-Over-charge, Over-discharge, with Light Sensor & Timer, including the Digital LED Driver to drive the ... rainy&cloudy days backup.2. Super bright LED with rectangular light distribution. 50-130% higher ground illuminance than others' with same ...