LEDs and fluorescent lights emit blue light that is not balanced by red and near infrared frequencies.
Incandescent lights emit red and near infrared wavelengths and very little in the blue wavelengths, making them a far healthier type of lighting in general.
Once the sun has set, the lower the light in your home the better. Candlelight is ideal. Salt lamps are another option that will not have an adverse impact on your health and sleep quality.1Sleep — Why You Need It and 50 Ways to Improve It
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