... bike paths, farms & ranches, parks, yards, campuses... Solar Panel2*95W, monocrystalline or polycrystalline, conversion efficiency: 15%Light ... half the wattage of high pressure sodium light.Controller: over 8 years of typical operating life, ... generation capacityEnvironmentally friendly - 100% powered by the sun, solar panels reduce fossil fuel consumption, eliminating pollutionSelf-contained solution ...