The LED light has a disk shape that opens to slide onto your patio umbrella, and then securely clamps shut around the pole. It features four larger lights and 24 smaller lights, and the brightness can be adjusted to dim, bright, or super bright. (Note: Your umbrella pole must be at least 0.8 inches wide and no larger than 1.8 inches wide in order to ensure a secure fit for the light.) To buy: $12 (was $15); amazon.com. At just $12, you may be worried the light will die out quickly, but customers say the design is “far superior to ‘brand name’ versions.” “Wow, this invention is genius and I wish I had it years ago,” writes another shopper. “Living in Florida we enjoy evenings in the yard pretty much all year-round and ambient lighting was always an issue. This product takes care of the lighting issue perfectly at a ridiculously inexpensive price.” If you’re looking for a simple way to light up your backyard this summer, shop the Oyoco Patio Umbrella Light while it’s on sale for just $12.