Echo Valley 4541 LunaLite Calla Lily Glass Art, 5.8 by 7.09 by 39.77-Inch, Yellow Light detecting sensor in the solar panel automatically turns light on at dusk and off at dawn Enhances any outdoor setting--whether it's a walkway, patio, flowerbed, or garden Hand-blown art glass; Battery included Textured and etched on the outside so it radiantly refracts the light from inside Do not expose to extreme temperatures and bring product inside during the winter