London Olympics and energy harvesting

The pedestrian power from a million pairs of feet is used to light the sustainable walkway to the London 2012 Olympic Park
Developed by Pavegen, the 12 installed floor tiles, powered by the feet of spectators, will be supplying the energy that will be used to power twelve LED spotlights illuminating the length of the walkway from West Ham station to the Olympic Park, providing full power for eight hours at night but also for 16 daylight hours at half power.

When stepped on, the tiles flex by 5mm converting kinetic energy into a useful electrical output. Based on an average of six watts per footstep at an expected 12 million footsteps, the tiles will generate 20 kilowatt- hours (kWh) or 72 million joules of energy during the Games.