eLEDing EE817DDC (B) Pure Digital Solar Powered Smart Light Pure digital solar/hybrid lighting engine, model EE817DDC is the equivalent of a 150W Incandescent lamp in brightness when it is motion activated True "Dusk-to Dawn" lighting with up to 40+ hours of continuous 'moon-glow' illumination even during inclement weather conditions without sunshine Eliding brand "SMART" feature with "ON as SMART ON" provides all night "moon-glow" lighting and amplifies light out-put upon detecting human movement Environmentally friendly lithium battery uses our Intelligent Power Management (IPM) to provide "SMART", reliable, green energy solar lighting Easy DIY installation, motion sensing coverage and illumination direction are easily adjustable. Operation Temp.: -4F (-20C) to +125F (52C)