Guerilla Lighting

Martin Lupton has taken gel-lighting one step further. Under his direction, lots of people with flashlights and colored gels gather in various public places throughout London, and they all light up one assigned spot on a wall or some sort of structure. The scene is then photographed, and the crowd moves on to another spot.

(photo by, I think, Martin Lupton)

I guess this is the performance-art version of the Lost America?

Thanks to Brian Chapman for bringing this Neatorama post to my attention.