Oak Leaf via Amazon offers the Oak Leaf Solar Globe Rubber String Lights for $15.99. Coupon code "ESLE4R4N" cuts that to $9.99. (Make sure you click "Add to Cart" from Oak Leaf in the "Other Sellers" sidebar; otherwise, this coupon won't apply.) Plus, Prime members bag free shipping. That's $40 off list and the lowest price we could find. It includes 30 LED balls, which glow for up to 17 hours on a full charge.