Waterproof design: With an IP68 rating and an upgraded waterproof function, these Solar Pool Lights can be fully submerged and offer an extended bulb lifespan. Heat resistant materials: Made from UV resistant PC and ABS, a waterproof LED sphere with a heat resistant silicone rubber seal, and a thickened ABS exterior for strong rustproof performance. Suitable for indoor and outdoor use and designed for longterm durability. Eliminates battery changes: The multicolor patio lights require only 6 hours of charging and can provide lighting for 3 to 5 nights automatically. No frequent battery replacements, delivering a long lasting and eco friendly lighting solution. Comprehensive application: for illuminating swimming pools, fountains, and aquariums with solar pool lights. Also suitable for Christmas, Halloween, weddings, and other parties.