In 1998 Wilkinson began to experiment with spinning lines of lights whereby the traces produce voluminous forms. The sculptures, Green Ray and Let’s Bounce, create illusory balls of light in mid air and have the presence of laboratory apparatus, suggesting an unfinished journey. These works explore concepts of dimension and reality within the physical world by recognising that seemingly solid physical objects are made of particles in motion with vast gaps of nothingness within their atoms. The sphere is of particular interest to Wilkinson, considering it to be the purest form in the physical world, the shape to which all matter, when fluid, gravitates.

“The mechanism behind light is fascinating, - all material things are fizzing with vibration, and as light interacts, colour is produced”