Nocturnal animals rely on darkness and specific light cues to manage their internal biological clocks. Research shows that short wavelength light, which we perceive as blue light, is the most disruptive to their circadian rhythms. This type of light is highly effective at suppressing melatonin, which is the hormone that tells an animal's body it is time to sleep.
In terms of color temperature, light with a high Kelvin rating is much more problematic. This means light that appears very cool or blueish is more likely to interfere with their natural cycles than warm, amber, or red lights. When nocturnal creatures are exposed to these blue wavelengths, their bodies may mistakenly believe it is daytime, leading to confusion in their hunting, mating, and resting patterns.
To help protect local wildlife, it is often recommended to use light fixtures that emit warmer colors. Red or amber toned lighting contains much fewer blue wavelengths. By choosing these warmer color temperatures, you can reduce light pollution and minimize the impact on the biological health of the animals living in your area.
