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Description
How Not to Be WrongHow a little mathematics goes a long way in helping you not to be wrong. The maths we learn in school can seem like an abstract set of rules, laid down by the ancients and not to be questioned. In fact, Jordan Ellenberg shows us, maths touches on everything we do, and a little mathematical knowledge reveals the hidden structures that lie beneath the world's messy and chaotic surface. In How Not to Be Wrong, Ellenberg explores the mathematician's
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.2 ★★★★★
Based on 892 reviews
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Product Reviews
★★★★★ 5
Expectations exceeded (and illuminated!)
I am so stoked about this purchase. Our outdoor lighting situation was terrible- motion-activated lights that cut out after ten minutes and zero power outlets outside. This umbrella light exceeded every expectation. Three brightness modes, all bright enough to actually see what you’re doing — no more squinting while socializing, reading, or attempting to do “work” outside. Cordless, easy to install, and long lasting. If you consistently forget to turn them off when you're done, you'll get about a week and a half from the batteries on the lowest setting.
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Reviewed in the United States on October 15, 2025
★★★★★ 5
Let there be light!
Easy to assemble. Lights are very bright. Very sturdy even with terrible storms it's still working and bright
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Reviewed in the United States on January 27, 2026
★★★★★ 3
Okay
I like that it fits my umbrella well, hinges open for easy application and removal, and that it has enough light for us to see our food at night.
I do not like that half of the outer lights do not work part of the time until I take out the batteries and swap them around.
Fine enough for the price, not worth the hassle of returning.
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Reviewed in the United States on May 10, 2025
★★★★★ 5
Perfect!
Lightweight and easy to use! Love the three light settings.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
Easy to use.
Works well. Light is bright. Our new patio umbrella does not have e a center pole, so the lights get somewhat blocked. But still pretty useful.
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Reviewed in the United States on April 5, 2026
