EFIZA LED 4-Pack - Brighter 3 LED Wireless Stainless Steel Solar Step Lights - Rechargeable, Wireless, Waterproof, Solar Powered Step Lights for Stairs, Deck, Patio, and Garden EFIZA LED Solar Step Lights (package of four) feature durable Monocrystalline silicon solar panels that recharge using sunlight, even on cloudy days. Three upgraded LEDs per light provide up to 8 hours of increased illumination on a full charge, and 50,000 hours of service. Includes a dependable 600mAh 1.2V NiMH HR03 AAA rechargeable battery, already installed. Automatic solar charging when AUTO/OFF tab is pressed to AUTO position. EFIZA LED Solar Step Lights automatically activate at dusk, providing dependable security illumination for patios and walkways, even in extreme weather conditions. Quick installation  the waterproof stainless steel case (Size: 4" W x 1" D x 3 H) is painless to maintain  easily attaches vertically or horizontally on decks, fences, or stairs - attach the screws (dowels also included) to the surface and then simply slip the case over the screws.