The lighting industry is deliberately misrepresenting the energy performance of home and office lighting on a grand scale, according to an official document that surfaced this week.

Most firms, including Osram, Philips and General Electric, are knowingly selling bulbs that are 10% less bright than declared on the packet (lumens), according to a statement filed with the World Trade Organisation by the European Commission.

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With the support of thr European Union (LIFE Programme and European COmmission). This work reflects the author's views and does not commit donors.