As the only UK city to have been shortlisted for the 2014 Green Capital Award, Bristol’s been proving it’s serious about reducing its carbon footprint. As part of that, GE lighting is replacing its high pressure sodium street lighting with more efficient CMH Streetwise ceramic metal halide lamps. In Phase I over 8000 lamps were replaced and Phase II sees a further 12,000 fitted in the city’s residential areas. All have a working life of 24,000 hours and dimmable ballasts, meaning they can be turned down between 7pm and 6am to save more energy. The initiative will help save the city 4.2mkWh a year in energy, or £0.5m.