These cool white solar fairy lights are great for decorating your garden and outdoors. They are powered by a solar panel which can positioned used the garden stake provided. It will soak up the suns rays during the day and automatically radiate a frosty, cool white glow as the evening approaches. The daylight sensor, will automatically switch the lights on at dusk and then go back to charging again during the day. Choose from 100/200 or 500 LEDs depending on the area you wish to illuminate. For the 2oo and 500 LED sets, there is a built in 8 setting memory controller allowing you to choose from multiple effects.