I believe it will make people think more, do you need lights on in every room when you are just watching TV. If offices and businesses were to have a policy of switching off all the lights when people go home, or even having motion sensitive lights they can make a huge difference.

    Yes low energy bulbs contain mercury but in many countries they are recycled, especially from offices.

    Have you considered how inefficient your car is driving around with the windows down? it makes a big difference to drag

    I do agree however that it is sustainable steps that will make a difference, not one off gestures