lights on navigation buttons

Thanks for the replies. I am a little confused about it because I have noticed that sometimes at night (while I am charging it next to my bed) the lights go off :(
It's a bummer because it makes it very hard to use in the dark room. That's why I was hoping there would be a way I could turn the backlight back on.
 
Actually what I have noticed it that whenever my phone is connected to the charger - regardless of the ambient light condition - the capacitative button lights will not turn on when I wake the phone for anything. If you disconnect the power, the lights will come right on for you to use ~ weird behavior...
 
Thanks for the replies. I am a little confused about it because I have noticed that sometimes at night (while I am charging it next to my bed) the lights go off :(
It's a bummer because it makes it very hard to use in the dark room. That's why I was hoping there would be a way I could turn the backlight back on.

If you want to see in the dark, download a flashlight app.