Something to consider: If you live in an area that is hot more than it is cold, in other words, you run the air conditioner a lot, then you're also using energy to pump all that aquarium heat outside.
If you live in a cold climate (I don't) then you actually "get back" some of the energy used by your aquariums because it all ends up as heat and that just goes to heating your house.
I live in Texas. Its late September and I'm still running the air conditioner.
99% Of all the energy used by your aquarium ends up as heat. Your pumps run, they churn the water and send it uphill. It falls back down hill and everywhere along the way turbulence are created which turn into heat.
Your lights produce heat right from the get go (even the LEDs) then, what light actually does escape the fixtures, falls on the tank. A small amount of that light is used by plants. They convert the light energy into chemical compounds. This is just about the only energy used by your aquarium that doesn't immediately turn into heat. The rest of the light that doesn't get used by the plants, well...that turns into heat too.
Your aquarium heater...yep, that makes heat too. It is the most "efficient" device in any aquarium. It is almost 100% efficient at making...heat.
So, basically you can take the total amount of electrical energy that you put into your aquarium and expect it to end up as heat. In cold climates that's great. You've been able to use that energy twice--once to service your aquarium and once to heat your house. In hot climates the opposite is true. You're paying twice--once to service your aquarium and once for the air conditioner to remove the heat from your home.
I don't mean to sound pessimistic. But you need to take that "waste" heat into account when evaluating the "total" energy used by your aquarium. If you live someplace cold where you are constantly using more energy to heat your home then all the energy you put into your aquarium costs you "nothing" because it is fully used to heat your home.
On the plus side: winter is coming (at least for the northern hemisphere) and we can all use our aquarium energy twice--once to service the aquarium and once to heat the house.
As for my own energy use totals, I'll have to check when I get home tonight.
The coolest fish I've ever owned were some fish sticks in my freezer.