Oak Leaf via Amazon offers its Oak Leaf 9.8-Foot 30-LED Starry Light Ball String Lights in Warm White for $7.99. Coupon code "6NODYNOH" cuts that to $5.99. Plus, Prime members bag free shipping. That's $14 off list and the lowest total price we could find. It includes a remote control and features eight lighting modes, and requires three AA batteries (not included).