Hi AVB,
I am going to start collecting data from a couple of other systems just so I can prove what is going on. As for you switching to LED's it all depends on what your power is costing you, Government here was replacing the incandescent globes in peoples houses with LED's for free just to help take pressure off our aging grid system, not because they cared about saving people money. I changed both my TV's last week with LED ones, consumption on the old ones were 140 watts, the new ones exactly the same size , 28 watts. What fires your power stations, this is where Australia is heading into trouble we have no future power station plans at the moment. We are so lucky our manufacturing industries have all closed down as we would not be able to provide enough power to keep them running.