The poll into energy use also revealed that eight out of ten families are rationing warmth in their homes.
Of those surveyed, nine out of ten are wearing extra clothes instead of turning on the heating, while 56% turn it off altogether when children are not in the home.
Energy Bill campaigners today called on the Government to drive down energy bills.
More top news
A Cornish village fundraising to develop a community centre were helped out with a donation from an unlikely source - the Emir of Dubai.
Thursday will be an unsettled day across many northern areas with outbreaks of rain which could be heavy, accompanied by strong winds.
Apple has marked the 10th anniversary since the first iPhone went on sale.