... saving automtaically turn on /off Solar Street Light(WS-SL-S10)Solar street light (WS-SL-S10), with one solar panel, is ideal for small ... , 2 ~ 3 cloudy or rainy days backupOptions for Solar Street Light (WS-SL-S10)Light Power 15W, 18W, 21W, 30W, 42W, 48WPole ... power outagesBattery backup for cloudy or rainy daysDistributed light and power - no single point of failure for enhanced securityEasy to ...