Wavelengths matter

Blue light in the Critical Circadian Wavelength (CCW) range (440-495nm) signals “daytime” to your circadian system and tells your
body to suppress the natural production of melatonin (sleep-friendly hormone), keeping you awake and alert. 

Blue light in the Critical Circadian Wavelength (CCW) range (440-495nm) signals “daytime” to your circadian system and tells your body to suppress the natural production of melatonin (sleep-friendly hormone), keeping
you awake and alert.