MARTIN BOND / SCIENCE PHOTO LIBRARY MARTIN BOND / SCIENCE PHOTO LIBRARY
Solar street lighting. This 'solar tree' street light has photovoltaic cells on top of its circular pads. During the day they generate electricity, which is stored in batteries underneath the seats. At dusk four of the LED (light-emitting diode) lights under the pad switch on. Photographed in Clerkenwell, London, UK.
Model release available. Property release not required.