Neon Mart via Amazon offers the Lighting Ever 33-Foot 100-LED RGB Dimmable USB-Powered Waterproof Rope Lights for $13.99. Coupon code "95PVWI4C" cuts that to $9.99. Plus, Prime members receive free shipping. That's the lowest price we could find by $9. They feature eight lighting modes and an automatic timer. Deal ends August 20.