Hallomall US Online via Amazon offers its Hallomall 72-Foot Solar-Powered LED String Lights in Multi-color, White, or Warm White for $20.99. Coupon code "O4VD43PM" cuts that to $15.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.67.) That's $3 under our August mention, up to $54 off, and the lowest total price we could find. It features two light modes, auto-on/off, 150 LEDs, and 10 hours of light per full charge.

Orders placed by December 22 are guaranteed to arrive in time for Christmas via Prime shipping; otherwise, upgrade to 2-day shipping by December 22 for $10.39 for guaranteed delivery.