Light is essential in our efforts to regulate our sleep-wake cycles. The type, intensity and timing of light exposure can have profoundly different impacts on both falling asleep easily and the quality of our restful nights. Understanding which lighting conditions create conducive environments will aid you in creating environments conducive to good nights’ rest.
In this blog, we’ll delve deeper into the science surrounding light’s effect on sleep, consider which colors of lighting provide more positive or detrimental outcomes, and offer practical recommendations to optimize bedroom lighting to boost quality of sleep.
How Light Affects a Person's Sleep
Light serves as the master regulator of our internal clock, the circadian rhythm, which orchestrates everything from hormone release to body temperature and alertness. Specialized photosensitive cells in the retina (intrinsically photosensitive retinal ganglion cells, or ipRGCs) detect changes in ambient light and relay that information directly to the brain’s suprachiasmatic nucleus (SCN). The SCN then synchronizes peripheral “clocks” throughout the body, telling us when to feel alert and when to wind down for rest.
Your Body’s Circadian Rhythm
Our bodies operate on a 24-hour cycle known as the circadian rhythm, which regulates sleep-wake patterns, hormone release and digestion. Light is one of the main external cues used to set off this internal clock; whenever light enters our eyes it signals our brain either to remain alert (during daytime hours) or prepare for rest (nighttime).
The Melatonin Connection
Melatonin, commonly referred to as the “sleep hormone,” is produced in your brain during darkness to induce sleep, however exposure to blue wavelengths found in daylight or screens suppress melatonin production by up to 50% (Harvard Medical School 2020), explaining why scrolling your phone late at night might leave you awake!
Intensity, Duration, and Exposure Patterns
- Intensity (Lux Level)
Brighter light produces a stronger signal to the SCN. A 200 lux bedside lamp will have a noticeably greater sleep-delaying effect than a 20 lux nightlight.
- Duration of Exposure
Prolonged exposure to evening light—even at moderate levels—can cumulatively push sleep onset later, shifting the entire sleep window.
- Timing Relative
Light exposure in the final one to two hours before bedtime has the greatest impact on delaying melatonin onset, whereas brief exposure early in the evening has a milder effect.
What color light is best for sleep?
So the best lighting colors for sleep are those that mimic the sun’s movement all day long. These colors help to signal our brains that it’s time to unwind and get ready for bed.
The following list of lights includes some of the best LED lighting options for bedrooms:
- Red
- Yellow
- Orange / Amber
These colors emit less blue light since they are cooler in color. Melatonin is a vital hormone that helps our bodies to get ready for a restful night and vital replenishment, which is reduced through blue light.
White light is less effective than other hues with less color. This is due to the different levels of white light are more destructive than other hues. White light, after all, contains all hues of the spectrum. This includes blue light.
Red Light
A popular and commonly suggested color of LED light to sleep with is red. It has been proven that the red light improves the quality of sleep and speeds the process of settling down.
switching into a bright red few hours prior to bedtime could assist you in falling asleep faster and should you awake during the night, exposure to red light can aid in getting asleep faster as opposed to being exposed to normal white light that has different colors that encourage alertness.
The price of light bulbs in red is affordable and widely accessible. Red hues are possible to select from an LED light bulb that is smart, which is installed in an e-lamp or table lamp. You will find red LED light bulbs that are suitable for use as nightlights.
Amber or Orange Light
Another light color that can be beneficial for sleeping is the color amber. It has been established that exposure to light from amber increases melatonin levels and improves the quality of sleep. One study showed that lighting with amber improved the quality of sleep for shift workers, with certain Danish nurses reporting better sleeping patterns after spending time in a dimly lit environment.
An amber light could be a great option for those who struggle to fall asleep in the daytime or work during the night. Amber light bulbs can be easily accessible and inexpensive, or an LED light bulb that is smart, that is placed in an existing table lamp can be programmed to show an amber-colored light.
Yellow Light
Another option that is a good choice is yellow light, which has been proven to reduce the time needed to fall asleep and improve the quality of sleep. A color that has the lowest amount of blue is yellow.
Worst LED Light Color for Sleep
- Avoiding Blue and White Lights
Melatonin Suppression:
Cool white light (5000K+) and blue-rich LEDs (450–495nm) suppress melatonin by up to 50% (Harvard Medical School, 2020), delaying sleep onset and fragmenting REM cycles.
Circadian Rhythm Disruption:
These wavelengths mimic daylight, tricking the brain into “daytime mode” and disrupting natural sleep-wake cycles.
Tips for Using Light to Improve Sleep Quality
After choosing the right color light that helps you sleep, changing the lamps to a lower temperature and exploring the many options of led technology, there are some other things you can do to sleep better.
- Beware of blue light sources like those on television or smartphones, PCs, and tablets.
- If you aren’t able to do that, opt for special glasses that shield your eyes from blue light.
- Pick acoustic lighting to reduce the amount of noise.
- If you’re not able to put in an entirely new chandelier, go for lamps that are small in size and have a yellow or orange light that you can put on your nightstand.
- Block out light from the outside with blackout curtains or a sleeping mask.
If you need to, pick an emergency light or kids’ lamp that is bright, warm colors.
How to Choose the Best Light for Your Bedroom
The best lighting for bedrooms should be between 2700K-3000K (warm white) or 3000K-4000K (soft white).
The brightness level should be adjusted to the particular use range of brightness is 400-800 lumens for bedside lamps. 1500-3000 lumens for main lighting with 5 to 20 lumens in night lighting.
Furthermore, including intelligent lighting and dimmable features in systems can enhance the comfort of your bedroom, which can improve the quality of sleep. Here are a few recommended kinds of lighting and brands that can help you achieve more restful sleep.
Yourlite Smart LED Bulb:
Adjustable color temperature and brightness, controlled via smartphone app or voice assistants (Amazon Alexa, Google Assistant). It can set sleep modes where the light gradually dims to help you fall asleep.
Advantages are a wide range of color temperatures (2700K to 6500K), multiple color options, easy installation, and convenient smart control.
Yourlite Smart String Light:
An adaptable lighting solution designed to improve your sleep environment. This smart LED strip offers customizable color settings and controls to help create a relaxing ambiance that facilitates restful slumber.
Customizable lighting with smart control options lets you create the ideal sleeping atmosphere tailored specifically for you.
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FAQ
Q1: What if you can’t install a colored light in your bedroom?
If installing colored lighting isn’t feasible, you can still optimize your sleep environment:
- Use dimmable warm white bulbs: Opt for bulbs with a color temperature around 2700K to 3000K, which emit a soft, warm glow conducive to relaxation.
- Utilize lampshades or filters: Adding a lampshade or using light-diffusing filters can soften harsh light and reduce blue light exposure.
- Adjust lighting habits: Limit exposure to bright lights in the evening and consider using lower wattage bulbs during nighttime hours.
These adjustments can help create a more sleep-friendly atmosphere without the need for colored lighting.
Q2: What if I need bright light for nighttime tasks?
If you require brightness for activities like cooking or working late, use task-specific lighting directed away from your eyes. For example, under-cabinet kitchen lights or desk lamps with focused beams can provide localized illumination. Opt for warm-toned bulbs (3000K or below) and keep the rest of the room dimly lit. Y Lighting’s TaskMaster Pro series offers adjustable LED strips with motion sensors and warm-white settings, ensuring functionality without compromising sleep hygiene. Avoid overhead lights, which flood the room with unwanted brightness.
Q3: The best hue of light that wakes you up?
The most effective light color to wake up to is natural sunlight. The sun’s rays, as quickly as you can following waking, can help you reset your circadian rhythm for the day, ensuring you feel more alert and tired later in the night. The blue light of a light therapy box could also be helpful. Some studies have also shown that early morning red light helps to decrease the effects of sleep inertia or grogginess.
