Brain Teaser

Challenge Your Cognitive Know-How!

Staying Sharp

Published January 08, 2026

Which part of artificial light can disrupt sleep cycles?

Electrical currents

Blue light waves

Brightness levels

Red light waves

Blue light waves, which are strongest in natural daylight, signal the brain that it’s time to be awake. Artificial lighting can emit blue light, too, especially energy-efficient LED bulbs. To help keep sleep cycles on track, avoid bright indoor lighting when it’s time to wind down before bed. Learn more about how indoor light can affect sleep here.

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Brain Teaser

Challenge Your Cognitive Know-How!

Which part of artificial light can disrupt sleep cycles?

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Staying Sharp

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MS15

Brain Teaser

Challenge Your Cognitive Know-How!

Which part of artificial light can disrupt sleep cycles?

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Staying Sharp

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