We’ve put the sun on a string. Hidden inside the expandable unit, Luci Solar String Lights pack 100 lumens into 10 nodes on an 18 ft cord. Along with mobile charging capabilities, this is the perfect way to light up your space.. Details:. 18 ft cord in an expandable unit. Mobile charging. 100 lumens. Warm white LEDs. Lasts up to 20 hours on a single charge (see details under "tech specs" below). Recharge via solar panel or quick charge via USB. Perfect for:. camping. hiking. backpacking. patio. RV camping. tent lighting. beach days. backyard