People view 'Borealis' a laser light art installation by Dan Acher which recreates the northern lights, as part of the Greenwich and Docklands Intentional Festival at Royal Artillery Barracks in Woolwich. Picture
Global Rainbow Laser Light Sculpture | Lights over Bournemouth & Poole
Green Lasers with Smoke by Twan Groenen, via 500px | Laser show, Lazer lights, Light in the dark