K.E.J. Solar Pool Side Lights Color Changing Solar Deck Lights Outdoor LED Step Light Waterproof Pool Accessories Decor for Stairs Fence Yard Driveway Pathway Yard Backyard Garden (Black-Color, 8)Solar Christmas Lights Outdoor Waterproof We changing amorphous (thin film) panels of solar fence lights to polycrystalline solar panels, which increases the photoelectric conversion rate from 10% to 17%. Outdoor Christmas Lights for House Solar powered lights simply need plenty of sunlight, and light on automatically at dusk and nighttime, off at daytime automatically. No bills as per electrical charges or wires. Just get them well charged for