[Doady]

The old light bulbs comsumed around 10 times more electricity than the new LED light bulbs, and most of that extra electricity to generate heat. LED/LCD monitors and TVs use like 1/3 the electricty of CRT monitors/TVs. Tablet computer consumes like 1/20 the electricity of a desktop computer plus monitor and speakers. Generally the electricity consumption and heat generated by household devices has reduced significantly in recent years (which the lower heat generated has also reduced the need for air conditioning). Air conditioning by itself is just a small part of the picture.

Window A/C is around 1500W. The old light bulbs were 60W or 100W each. Think about that.