It’s almost always better to sleep in the dark; however, you may want some light when taking a daytime nap. Naps are usually the most refreshing when shorter than 30 minutes, and having the lights on may keep you from oversleeping and settling into a deeper sleep than you intend.

What Other Steps Can Improve Sleep and Circadian Rhythm?

If you have long-lasting sleeping problems that are affecting your energy, thinking, or mood, you should talk with your doctor who can best determine the cause, including any potential circadian rhythm disorder.

In addition, you can take steps to improve your sleep hygiene and reset your circadian rhythm. Avoiding excess caffeine, having a consistent sleep schedule, and getting regular exercise, are examples of how your habits and routines can support healthy sleep.

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