Size: 15 11.1 2.4cm/5.90 4.37 0.94in(lamp holder); 12.9 11.4 1.5cm/5.07 4.48 0.59in (solar panel). Solar panels: High quality polysilicon, 5.5V 1W. Solar outdoor lights illuminate your garden, courtyard,aisle, porch, courtyard or driveway, etc.