Leaving lights on in empty offices is nothing to do with laziness or whatever. Offices, business units, etc etc have peak demand meters and the charges are based on the peak demand. If the peak occurs during the day but drops at night you will still be paying on the peak rate so there is no point in turning things off as the peak has already been set.I did my apprenticeship with AEI and spent time in the lamp making division. There was a view even in those days that switching on a tubular fluorescent switching it off then back on again used far more electricity. That’s why offices tended to run them when the workers had left. In reality regular switching off and on was not recommended as in those days the ballast units could be problematic and expensive to replace. But as to using an hours worth of electricity each time that was never an issue. But like the old chestnut of stopping the car engine in traffic. Incandescent lights definitely don’t draw an hours worth of power each time you start one up.
We have a tumble drier but tend to use a dehumidifier in the bathroom to dry clothes. Works out much cheaper and we also obtain some useful warmth too.
And no it doesn’t stay in the bathroom when that room is being used for showers etc. In fact the bathroom has only been used less than half a dozen times in 2.5 years……..visitors.
Every lamp inside and external is LED. They have come on in leaps and bounds.
It also has the advantage of improving security as there is nowhere to hide if all the lights are on!