DecornovaDirect via Amazon offers the DecorNova 20-Foot 30-LED Solar Outdoor String Lights in Multicolor for $9.99. Coupon code "JV6RRYCZ" cuts it to $4.19. With free shipping for Prime members, that's $6 off list and tied with our July mention as the best we could find. These waterproof lights feature a rattan ball design, two lighting modes, and up to 17-hour battery life. Deal ends August 30.