Drones fly in huge Star Trek emblem formation over London.

To mark Earth Hour on 23 March, 30 LED-carrying quadcopter drones flew in formation over Tower Bridge, marking out a 94-metre-high Starfleet emblem. It was designed and carried out by Ars Electronica's Futurelab, whose pilots made it rotate slowly in the air not unlike some kind of symbol of invasion from beyond the stars. Then it dimmed, as the buildings alongside it dimmed, as part of the yearly day designed to raise awareness about climate change.

This amazing light show by Paramount, in conjunction with Ars Electonica Futurelab & Ascending Technologies, will see quadrocopters fly into the night sky, forming the Star Trek federation logo beside Tower Bridge on a scale never seen before. In keeping with Earth Hour's initiative, the quadrocopters will utilize batteries that were charged in Austria using green energy from the Austrian renewable energy grid specifically for this event. The event will coincide with WWF's Earth Hour at 8:30 pm. Along with key landmarks such as Big Ben, the Houses of Parliament, and The London Eye going dark, the quadrocopters will turn off their glow in support of Earth Hour. To signal the end of Earth Hour at 9:30 pm the quadrocopters will reform the Star Trek logo above London's skyline. The logo formation will hover about 36m (118ft) above the ground at the lowest point and the highest point (the tip of the logo) will be at approximately 130m (426ft) above ground. The total height of the logo will be approximately 94meters (308ft). The light show can be captured from the main location at Old Billingsgate Walk, giving a view of Tower Bridge and City Hall. Other vantage points for the public are the Tower of London and on location at Potters Field Park, Tooley Street, Southwark, London SE1 2AA.