I saw a video relay of the excellent production of Frankenstein last night from the National Theatre. I was particularly taken by the festoon of hundreds of tungsten lamps of all shapes and sizes that stretched out high across the audience. From what I could tell, each lamp had its own dimming channel because ripples of light were sent across them in all directions. Does anyone have detail about how this was achieved in terms of power control and also the manner in which patterns were generated? Thanks