Why Night Light Colour Matters
Choosing a night light might seem like a small decision, but the colour of light you use in the hours before bed and throughout the night can have a surprisingly big impact on your sleep quality. Not all light is created equal when it comes to how your brain interprets it, and picking the wrong colour can actually make it harder to fall asleep or stay asleep.
The reason comes down to how light affects melatonin, the hormone your body produces to signal that it is time to sleep. Certain wavelengths of light suppress melatonin production more than others, which is why scrolling through your phone in bed feels so disruptive compared to reading by the glow of a warm lamp.
The Science of Light and Sleep
Your body's internal clock, known as the circadian rhythm, relies heavily on light cues to know when it is time to be awake and when it is time to wind down. During the day, bright blue-toned light from the sun keeps you alert and energised. As the sun sets and light becomes warmer and dimmer, your brain starts producing melatonin in preparation for sleep.
The problem is that modern lighting and screens expose us to blue light well into the evening, confusing our circadian rhythm and delaying melatonin production. This is where the colour of your night light becomes important. A night light that emits the wrong colour can mimic daytime light signals and keep your brain in alert mode when it should be winding down.
Red and Amber: The Best Choices
Research consistently points to red and amber as the best colours for a night light. These warm tones sit at the opposite end of the light spectrum from blue, which means they have the least impact on melatonin production.
Red Light
Red light has the longest wavelength and the lowest colour temperature of any visible light. Studies have shown that red light exposure before bed has virtually no effect on melatonin levels, making it the most sleep-friendly option available. A 2012 study published in the Journal of Athletic Training found that athletes exposed to red light therapy for 30 minutes before bed experienced improved sleep quality and increased melatonin production.
Red light is particularly good for situations where you need to see without fully waking up, such as checking on a child during the night or finding your way to the bathroom. Your eyes adjust quickly and your brain stays in sleep mode.
Amber and Orange Light
Amber light is another excellent choice and tends to be slightly more visually pleasant than red for people who find pure red light too intense or unfamiliar. Amber filters out most blue wavelengths while still providing enough visibility to move around safely. Many salt lamps naturally produce this warm amber glow, which is one reason they have become so popular as bedroom lighting.
Colours to Avoid
Blue and White Light
Blue light is the biggest disruptor of melatonin production. Even small amounts of blue light exposure in the evening can delay your body's sleep signals by up to an hour. White light, which contains significant blue wavelengths, has a similar effect. This includes the standard LED bulbs found in most overhead lights, phone screens and tablet displays.
If you currently use a white or blue night light, switching to red or amber is one of the simplest changes you can make to improve your bedtime routine.
Green Light
Green light falls somewhere in the middle. While it is less disruptive than blue, research suggests it still suppresses melatonin to some degree. It is a better choice than blue or white but not as sleep-friendly as red or amber.
"We switched our hallway night light from white to red and the difference for our toddler was incredible. She stopped waking up fully every time she needed the bathroom." - Jess P., Townsville
Best Uses for Night Lights
Night lights serve different purposes depending on who is using them and where they are placed. Here are some common scenarios and how to choose the right colour for each.
Children's Bedrooms
Many children feel more secure with a night light, and that is completely normal. A dim red or amber light provides enough reassurance without interfering with their sleep. Avoid novelty night lights with bright white or colourful LEDs, as these can be stimulating rather than calming.
Hallways and Bathrooms
If you or your children need to get up during the night, a red or amber night light in the hallway and bathroom means you can see where you are going without triggering your brain's wake-up response. This makes it much easier to fall back to sleep afterward.
Bedside
A bedside night light with a warm amber tone can replace your overhead light during your wind-down routine. Use it while you read, stretch or listen to calming audio through your sleep headphones, and you will find the transition to sleep feels much more natural.
"I bought a simple red LED night light for our bedroom and it has made such a difference. I can still read my book without feeling wide awake afterward." - Chris K., Geelong
Practical Tips for Choosing a Night Light
Check the colour temperature: Look for lights rated below 2000K (Kelvin) for the warmest, most sleep-friendly glow. The lower the number, the warmer and redder the light.
Choose adjustable brightness: A dimmable night light gives you control over how much light is in the room. The dimmer the better for sleep, as long as you can still see enough to feel safe and navigate.
Avoid smart lights on default settings: Many smart bulbs default to cool white when first turned on. If you use smart lighting, set up a specific evening scene with warm, dim tones that activate automatically in the hours before bed.
Consider placement: Position your night light low and out of direct line of sight. Light that shines directly into your eyes is more disruptive than ambient light bouncing off walls or floors.
A Small Change with Big Results
Switching to a red or amber night light is one of the easiest, most affordable changes you can make to support better sleep. It works for adults and children alike, requires no special equipment and the difference can often be felt within the first few nights. If you are looking for a simple starting point to improve your sleep environment, this is it.
