Ohh, summer nights... soft warm breezes, cool drinks and bright colorful lights to create just the right mood. The Borealis party solar string light automatically turns on each night, all night for up to 20 hours. There are 2 brightness settings to suit every style and occasion. We could go on about the advanced solar technology of this light, but really, it has to be seen to be believed. Easy to install. Create your own (solar) light display in minutes and dazzle your guests. The finishing touch for parties and get-togethers, Borealis solar light is a great addition to any yard, pool, cottage, dock etc.