He was the top winner in the 10% Energy Challenge campaign, which was launched in April to educate households on energy saving tips.

Households have to achieve at least a 10% reduction in their energy consumption from May to August, from the January to April period to qualify for the draw.

Mr Wong, who lives with his wife and daughter in an executive flat in Sengkang, was able to cut his energy consumption by 28.8% during the qualifying period.

His average monthly electricity consumption from January to April was 462 kWh. This was cut to 329 kWh.

NEA's Chief Executive Officer Lee Yuen Hee said: 'We hope Mr Wong's win and story of practising simple energy-saving measures at home will inspire more members of the public to do the same.

'Through these individual efforts, they can help to fight climate change and save on their electricity bills as well.'

Mr Lee added that the NEA will step up efforts to raise awareness of energy efficiency among households.

'We will also be collaborating with other government agencies to ensure a concerted and sustained outreach to households that would help them save energy and reduce their electricity bills,' he said.

Other NEA energy efficiency programmes launched this year included the energy labelling for refrigerators and air-conditioners which was made mandatory in January.

The scheme was introduced to help consumers make more informed choices in picking these appliances. It will be extended to clothes dryers and other appliances such as lightings and water heaters by 2010.

NEA recently provided $42,000 to co-fund a pilot project to install the E-Track energy consumption tracking device in 200 HDB flats and to determine the effectiveness of the device in promoting energy efficient behaviour among the participating households.

The trial is expected to be completed in the first half of 2009. If E-Track is found to be useful in promoting energy efficient behaviour among households, NEA will study the viability of extending it to more homes.