Yes, and plenty to read on the subject. Look around for blue light and sleep &#x2F; circadian rhythm &#x2F; melatonin production.<p><a href="http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pmc&#x2F;articles&#x2F;PMC2831986&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pmc&#x2F;articles&#x2F;PMC2831986&#x2F;</a>