Holigoo Direct via Amazon offers the Qedertek 20-Foot LED Globe Outdoor Solar String Light in Warm White for $7.99. Coupon code "GVVL26RA" cuts it to $4.79. Plus, Prime members bag free shipping. (Non-members can get free shipping with orders of $49 or more; otherwise, shipping adds $7.12.) That's $35 off and the lowest total price we could find. It's IP65 waterproof and features 30 LEDs and up to eight hours continuous use.