Influence of light exposure at nighttime on sleep development and body growth of preterm infants. You can learn more about how we ensure our content is accurate and current by reading our editorial policy. Healthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. The researchers observed that participants exposed to their preferred light color fell asleep significantly quicker. In the first experiment, participants were exposed to white light, a random color, or their self-selected preferred color. In the study, researchers ran two different experiments. Individual differencesĪnother 2017 study found evidence that individual taste may also play a role in determining which color light is best for inducing sleep. The researchers noted that light under 10 lux had no effect.
One 2017 study on mice found that red light at an intensity of 10 lux or higher had the potential to induce sleep. The researchers found that after 14 days, participants who received light therapy improved their sleep quality and melatonin levels significantly compared to participants not exposed to any light. However, at this time, more research is needed to support this theory.Ī small study from 2012 examined the effect of 30 minutes of nighttime red light therapy in a group of 20 female basketball players. It’s thought that colors close to red on the light spectrum might stimulate melatonin production. However, there’s no research backing the claim at this time. Since pink light is made up of a combination of red and purple light waves, it could also be beneficial - in theory. There’s also some evidence that individual preference may also play a role.
Limited research of humans has suggested some evidence that red light may help stimulate sleep.
However, because rodents are nocturnal and color-blind, it’s hard to draw conclusions from these studies. Up until now, most studies examining the best types of lights to stimulate sleep have been performed on rodents.
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