Award-winning English rock band Radiohead have been at the forefront of live performance for more than two decades, dazzling concertgoers around the globe with mesmerizing audiovisual stage displays that create a deep sensory connection between the band and its audience.

For 2008's "In Rainbows" tour, Radiohead sought to continue this tradition of excellence while drastically reducing the environmental impact of their lighting equipment.

The band has a history of vocal environmental advocacy, and has expressed discomfort over the massive amount of energy consumed by grandiose rock shows. Seeking to cut carbon emissions without compromising visual spectacle, Radiohead's longtime lighting and stage director Andi Watson turned to LED lighting technology from Philips Color Kinetics.

Watson and tour production manager Richard Young were shown pre-production units of the ColorReach Powercore (now specified using ColorReach Powercore gen2) fixture, which can produce over 5,000 lumens of color-changing light over a distance of 500 ft (152 m) or more. The industry veterans were impressed by the light projection and low power consumption of ColorReach Powercore. Five fixtures were supplied for the South American leg of the tour by Bristol-based Utopium Lighting, one of the first rental companies at the time to invest in this groundbreaking LED lighting technology.

Radiohead's production team hired fabrication experts Specialz Ltd to build custom aluminum "yokes" for the fixtures, which allowed the lights to hang securely from the stage's front truss.

iColor Flex SLX LED strands (now specified using iColor Flex LMX) were used to edge light equipment pods. The flexible strands of individually addressable LED nodes are designed for extraordinary effects without the constraints of fixture size or shape, and can be positioned in virtually any two- or three-dimensional array.

Watson also used iW Blast Powercore fixtures to ensure that each band member was properly illuminated. The versatile fixtures produce intense illumination sufficient for spotlighting on a stage without the heat that can make a performer uncomfortable.

"Doing away with conventional lighting on set was a massive leap of faith for us. Of course our concerts are all about delivering the music but the fans expect a visual spectacle as well. At the same time, we can't just pollute the atmosphere merely for effect," said Watson. "Having put the LED equipment through its paces we were convinced it was the right way to go. To be honest, not having a single discharge or incandescent lamp in the design has set a new benchmark for us."