Help display lights alone

[saloio]

good night. I have an xperia arc is occasionally lights up the display without anyone messing him. is this normal?: Confuso:

 

[Josh-SonyXperia]

It might be normal if you have any app installed that "wakes up" the phone. For example I used to have an app on the phone that would wake up the phone every certain amount of time. This might be your case as well.