Buy It: $12 (orig. $15); amazon.com

Setup is easy: You can attach it to any umbrella holder that measures between 0.86 and 1.181 inches in diameter by pulling either side of the device to open it and then clamping it around the pole. The flexible springs in the disc make it adaptable to different umbrella poles, while the two hanging hooks mean you can also attach it to an overhang (just add an S hook). It has four lighting levels to choose from, and you can quickly switch between them by pressing the on/off button, which will rotate through the settings. The battery-operated light lasts for months or even “one or two seasons,” according to reviewers, before you need to replace the four AA batteries inside. (Actual durability depends on the battery you use.)

One shopper called it a “must-have” for yards, while another said it’s “easy to use and simple to replace batteries when they run out.” The reviewer continued, “We have no lights outside and these have completely changed how we plan to use our backyard patio. Card games, dinner, you name it! It can now all be done at night outside on our tables thanks to these lights.”

Another person said it’s “literally perfect,” and added, “It lights up our umbrella so well. You can adjust brightness and it is not in the way when you fold the umbrella up. It slides up and down when you need it to and also stays in place.”