Cheapest time to use electricity

Is there a time of day when electricity costs more or less? It makes sense that electricity costs less in the middle of the night when demand is low, but I can’t see if that is the case with Bulb.

Is there a time of day when electricity costs more or less? It makes sense that electricity costs less in the middle of the night when demand is low, but I can't see if that is the case with Bulb.

If you are on a single energy tariff the unit cost is the same throughout 24 hours. Something like Economy 7 will give you cheaper energy during the night period.