How 250 coloured lights make white light
Two hundred and fifty coloured fluorescent lights and 30m (98ft) of mirrors have gone into a new art installation at the National Media Museum in Bradford.
Artist Liz West has built a room with mirrored walls that make the bright lights look like they stretch as far as the eye can see, getting more warped and distorted as they disappear into the distance.
The work is meant to demonstrate how combinations of certain colours create white light.
It is part of the museum's Light Fantastic exhibition, which also includes old cameras and other artefacts that show how light has been used in film and photography over the decades. It runs from Saturday 18 July until 1 November.
Video journalist: Dan Curtis. Producer: Ian Youngs.