【Safety Lighting & Modern Triangle Design】Light up every step for enhanced safety! NIORSUN solar step lights feature a unique, sturdy triangular design that fits securely in step corners without obstruction. The solar stair lights cast a wide beam to illuminate step edges, reducing tripping hazards after dark. This long-lasting and robust design of outdoor stair lights also adds a modern geometric accent to your front door, deck, patio, garden stairs, porch, yard, and sidewalk 【Super Bright & Long-Lasting Runtime】Powered by 13 high-quality LEDs (80 lumens, 3000K warm white), these outdoor stair lights deliver ample illumination. The 800mAh battery achieves up to 8-10 hours of automatic nightly runtime after just 5 hours in the sun. The enlarged solar panel of the solar step lights for outside ensures efficient charging 【IP67 Full Waterproof & Sturdy Construction】Constructed from tough, high-strength ABS material with a fully sealed design, NIORSUN solar lights for steps carry an IP67 rating for ultimate dust and water resistance. Built to be resilient, the outdoor step lights stand up to harsh weather including heavy rain, snow, and frost for reliable year-round performance 【2 Wire-Free Installation Methods】Install in minutes with two wire-free options: strong 3M adhesive tape for quick placement or screws/bolts for a permanent fix. The low-profile design stays out of the way. (Tip: Install in a sunny spot and turn the switch on before first use.) 【2-Year Warranty & Quality Promise】We back the enduring quality of the deck stair lights with a 2-year warranty. If any issues arise within this solar stair lights outdoor waterproof, contact our support team for a swift resolution, ensuring your complete satisfaction