A how blue light affects on the sleep?

 A constant affecting of blue light , especially on the sleep, confuses a brain and destroying natural hours of our organism. When in the evening a natural light is turning off, brain will receive sign to melatonin manufacturing, which a ready us to sleeping and night sleep. A high level of power blue colour from artificial sources is contrary, suppress melatonin manufacturing and give for brain a sign to stay awake. Thus are all meaning, that your children all night staying before screen and under artificial  colour from clear lamps , his brain is not knows, a which time is now? Children's are very sensitiveness to suppressing melatonin  affecting of blue light, but in one research is shown, that in a same level for light a level of melatonin in children's is falls for two times stronger, than in adults, and has been a put, that  children's are more sensitive ,than teenagers and youths till a sex maturation. In research for 2003,where are taken part a more ,than 200 peoples, studied a tie between a sleep and using digital devices in children's and youths. And it's   found, who used smart-devices digital are later slept gone, and less had common time for sleep. Actually,    a failure of sleep in teenagers is growing since 2012 y. as approximately on the same time, when  smartphones and other portable   clever devices stayed as item for a first needing. Research used between Norwegian teenagers,as shown, that a time, used a screen as on a daily and before sleep is negativity affects on the sleep. And absence of  enough sleep lead to inadequate restoring processes on the night, and to destroying metabolism.