Hallomall US Online via Amazon offers its Hallomall Solar-Powered Color-Changing LED Table Light for $19.99. Coupon code "DIIOV85J" drops it to $12.99. Plus, Prime members bag free shipping. That's $7 off and the lowest price we could find. This weatherproof light turns on automatically at night and provides up to eight hours of light on a full charge. It features static white and RGB color-changing light modes. Deal ends August 30.