It's a webpage with a simple picture of a lamp and the text "40 people in the room, click anywhere to turn the light on/off". The page background alters between

It's a webpage with a simple picture of a lamp and the text "40 people in the room, click anywhere to turn the light on/off". The page background alters between dark gray and white depending on whether the light is off and on. It's essentially a collective online light flickering exercise and it's about as strobe as you imagine that would be.