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" Circadian lighting might seem complicated if you've never heard of it before, but it can be done in a number of easy ways.
At its simplest, try using a string of very warm white, or orange, LEDS in the evening when you are relaxing before bedtime.
In overhead or side lights, use circadian light bulbs, which can be set to different colors of light, controlled by a dimmer switch.
Use color-changing LED light strips or bulbs with their own color remote controller.
Consider buying color-changing lighting products, such as stand-alone table or floor lamps.
Use a wake-up light alarm clock to wake you gently with color-changing lights in the morning, and relax you with soft lighting in warm tones at bedtime. "
― , Design A Healthy Home: 100 ways to transform your space for physical and mental wellbeing