"... not leaving office equipment such as photocopiers and computers in standby mode after hours."
Seriously? The largest consumers of power in most commercial buildings are lighting (admittedly they mentioned non-essential lighting) and air conditioning and it's just mind-boggling how much is left on unnecessarily after hours. Especially air-con. Appliances left in standby mode drawing 3W-5W will never make a dent in the load when compared to air-cons pulling well over 1000W or most fluorescent lighting units (3 tubes x 36W = 108W - look how many of these are left on in most buildings).
There needs to be a lot more financial incentive for changing power consumption habits - and I don't mean simply increasing the price unless there's also a move to decrease pricing for non-critical periods as is done in some other countries. I'm sure many domestic consumers would happily run their washing machines, dishwashers and tumble-dryers late at night if it meant a sizable reduction in power cost.