The Solar Goes Green brand of Solar Powered Flood lights are designed to achieve the perfect solution for your commercial or high demand flood light needs. The SGG-F156-2R Solar Flood light blends the benefit of Dusk to Dawn Flood light operation with a selectable motion PIR detector. With the PIR Sensor installed in the unit, the flood light will operate 4 continuous hours at dusk and then automatically shut off the light and convert the unit to motion activated illumination. Without the PIR Sensor installed, the light will operate automatically on at dusk and off at dawn. The Solar Goes Green Solar Flood Light -156 LED is ideal for lighting an area approximately 30 ft. W x 50 ft. D. Ideal for use in illuminating signs, horse riding arenas, parking lots, and driveways. Estimated light output is approximately 200-Watt. The Lumen measurement is 780 lm (6 to 7 lm/pc). Should you desire it, an on/off switch on light fixture for convenience is provided to override photocell. Depending on environmental issues (geographic location in US and weather temperatures) estimated night time hours of operation is 10 to 12 hours on a fully charged battery. This installation is suited for ground stake mounting of both solar panel and LED Light for ground effect lighting, up lighting walls or structures. Available for solar panel installation is the SGG-PoleMT-301 which will allow for easy installation of the solar panels to a pole or flat mount surface.