I am the reason that my parents' electric bill is 400.00.
And how did you manage that?
I left all the lights and TV's on all the time.
It's not right to keep all the lights and TV's on to run up your parents' electric bill. Wasting their money like that is an irresponsible thing to do. You should let them know what you did and offer to pay for it.
They let me have my phone and other electronics, so I won't feel the difference.
Your parents feel the difference, though. Just because you're not responsible for paying for it doesn't mean you should run the bill up.