There are some major differences in cost depending on where you live. Let's start in with Junior's light. So Junior's light isn't that significant. But, typically where there's one light left on, you'll find more. If you find four or five lights left on it starts to add up.
Many families have a TV on almost continually.
That works out to about two cents an hour for entertainment. Ceiling fans are touted as an excellent way to keep cool cheaply. The info provided by FPL didn't include air-conditioning. So much depends on the size of your home, how well it's insulated and how warm the temperature is. Here in South Florida the summer months can be a challenge for your air-conditioner.