Bed time! For everything...

[Somz]

So, we have our colonists going to sleep at night whether they're tired or not, in A6 even plants refuse to grow and sleep instead, so how about it:
A toggleable power saver that would turn off all the lamps around the base, maybe with customization: the possibility of including certain objects, such as the cooking stove or the machining table.
Thus when your colonists get the sleep order, your base would just turn your power-hungry machines off instead of letting them continue to devour the much needed juice unnecessarily.

[MrDecay]

A nifty little feature this could be