Rethink 155015 Multi-Purpose Gutter/Fence Solar Light, 2-Pack LEDs last up to 100,000 hours Automatically illuminates at dusk On/off switch Solar Powered Long-lasting Led Bulb Technology Mounts On Any Gutter, Wall Or Post Easy Tilt Mechanism For Perfect Angle Illuminates Yards, Pathways & More Without Messy Wiring Or Electricity