HSHW (Human-Sized Hamster Wheel)

It is in the ballpark of 10 Watts at a slow run. But that is becuase we did not have the ideal gearing. We could have made a more complicated gearing system to get a lot more power, but we did not. So it is not a question of how long you would have to run, but really of how fast. It would take a very fast run to keep a 100 Watt (bright incandescent) bulb lit. So in order to power a house, we would need better gears, and then it would probably take about 10 of the wheels.

exactly how much electricity does it generate?
And How long time whould you have to run to light a whole square one evening?