Do you have a sleep problem when you get a tablet or smartphone??

Have you seen that when you get on a bus or a subway, everyone there hold a tablet or a smartphone? The development of technology can not only distance people, it can also cause sleep problem. According to the to researchers at the Lighting Research Center at Rensselaer Polytechnic Institute, who’ve found that two or more hours of exposure to backlit devices suppresses melatonin.

“Our study shows that a two-hour exposure to light from self-luminous electronic displays can suppress melatonin by about 22%,” Figueiro says in a statement.
So if you want to have a sound sleep at night, you had better to let your electronic devices sleep for a little in the morning