That's what the power in Watts tells you already. Why should an hour integration time be implied (which makes the whole thing redundant)? Why not two hours?AFAIK, it's always an implied reference period of an hour. ...because it makes sense to have a defacto standard on how you can gage how much power an appliance device uses regardless how long you effectively use it. In that sense, you are effectively comparing using the same baseline (the amount of watts over a period of an hour).
If you use it less than an hour, then you can always calculate it from the average draw over an hour number.
It simply makes no sense in this context.
Please, could we stop this stupid power/energy unit stuff? It was all said, and everybody claiming the Wh unit given on a power supply makes sense should think about this again with a clear mind. The proper arguments were given. All what's needed is to grasp the definitions of power and energy.