SUI 15 Watt All in One Integrated Solar Streetlight, A semi-integrated solar LED streetlight comes with an inbuilt lithium battery and an external solar panel for recharging the light. It works on the principle of dusk to dawn wherein the streetlight switches on automatically when the sun sets and it switches off when the sun shines. This is a 24W model which gives an output of more than 2800 lumens and has been designed to function with motion-detected human movements. The package contains - a solar LED street light with an inbuilt battery & external solar panel. Pole is not included. It is Solar powered, maintenance free, energy saving and environment friendly, charged by solar panel, zero power consumption and no pollution. Best suitable for use at home, garden, pathways and parks. The Solar Panel, Lithium Battery & LEDs used in the product are of the highest standards with BIS, MNRE & IEC certifications.