If we have less power, we most likely have

more work done over the same amount of time
the some amount of work being done over a shorter period of time
more work done over a shorter period of time
the same amount of work being done over a longer period of time

If we have less power, we most likely have the same amount of work being done over a longer period of time. This is because with less power, it may take longer to complete tasks or projects that would have been done more quickly with more power.