If you’ve ever wanted to stay up reading in bed after the lights are out — or have a partner who’s kept you up — you understand the benefit of a good book light. We just found  Amazon’s top-rated rechargeable wearable book lights on sale for up to 48% off!

That makes it just $17.99 for a limited time.

The popular Glocusent light gives you 6 adjustable brightness levels, 3 different color tones, and 80 hours of reading time on one USB-C charge. It also has a narrower beam angle than other book lights, so it’s perfect for reading in bed without disturbing anyone else. We’ve even recommended it as a great gift for college students with roommates.

Because it’s wearable, it’s also helpful for late-night walks to the bathroom, early morning jogs, or heading out to check the mail in the dark. And it’s nice to know that it’s certified Climate Pledge Friendly.

Limited time deal on the best-selling book light on Amazon: Just $17.99

There are lots of colors of the book light available, and while the pink one has the biggest discount right now percentage-wise, the black and purple neck lights are also just $17.99 when you use the 10% off coupon on the site. Or, spend a dollar more for a color you like better.

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