The less energy is needed to achieve a compartively equal level of performance, the more efficiently this energy is being used. An energy input is required to obtain a specific energy service, such as a warm home in winter or a flood-lit stadium at night. If all energy saving potentials are tapped during the modernisation of a building it is possible to save up to 90% of the previous energy demand. Electricity efficiency can be increased by a factor of 5 if conventional fluorescent light bulbs are replaced with energy saving light bulbs.
Energy-conscious behaviour also helps, next to efficient technologies. The refrigerator does not need to be larger than required or run at Arctic temperatures and overheated rooms are, as a rule, unhealthy. Unnecessary energy consumption due to stand-by mode in electricalequipment can be avoided by using a socket strip with a switch.