A glut of manufacturing capacity and near-collapse in rare earth metal prices is driving down the cost and hence encouraging the rapid take-up of LED lighting. The Financial Times believes LED technology is reaching a tipping point, particularly for the commercial sector, as price declines bring forward the payback time on the initial cost of investment. According to McKinsey, quoted in the article, LEDs are set to account for 41 percent of the overall value of the lighting market in 2016 and 63 percent by 2020, versus 12 percent last year. Lighting is a huge consum...