A solar-powered lamp, which is as thin as a magazine cover and sticks onto most surfaces has been developed by a Hong Kong inventor, a media report said.

The lamp won designer Keikko Lee, 26, the gold price in South Korea's first international design competition held in October, the South China Morning Post said.

Lee said the lamp has electroluminescent material on one side and solar panels and sensors on the other.

The lamp can be stuck to a window where the solar panels absorb sunlight to charge the lamp which can then be taken down and placed in a room to provide light at night.

"No extra electricity is needed," said Lee, a graduate of Hong Kong Polytechnic University's school of design.

She said that because the lamp is very thin and light it could reduce complicated manufacturing procedures and save on raw materials.

"I believe not only the product itself has to be ecological, but the manufacturing process should be ecological too, in order to make our environment better," she added.

Lee entered the lamp in the Seoul competition which was organized by the city council to attract sustainable ideas for the future.