Lately I have been involved with the photographic documentation of Derbyshire's longest artwork - the Derwent Pulse (derwentpulse.org). Last night the passage took us to illuminated Chatsworth House. The first image was taken before the 'light flow' started. This was the exposure for the background. The finished image below is a composite of about 50 frames, recording the parade on the shores of the river Derwent and the floating spheres.