Light as attention scale

I imagine in an octagonal mediated space, light is very important. I imagine I can color my light, or make it more or less intense, so others get a sort of peripheral warning that I want to participate and say something for example.

Between speaking and lurking there is a series of attention moes that we may use as cues.

In my previous research tuning, reciprocity, negotiation adn engagement are all different in presence.

How can we make this interactive? How does my light change your light over distance?