How can you tell if a light fitting takes only energy efficient bulbs when doing a building survey?
A quote from the Energy Saving Trust You can now buy low energy light fittings which will only take low energy lightbulbs. These use a ballast or transformer fitted into the base of the light fitting. It controls the supply of electricity to the bulb, allowing for a small surge of power for a millisecond to light the bulb and then reducing the electricity flow to a very low level. Low energy fittings require a pin based energy saving bulb. This is a different fitting to a conventional bulb but will ensure that the bulbs you buy in future will always save energy, money and the environment.