Using the dark to communicate

Darkness can be used to an advertisers advantage. Take new york for example, infact the majority of big american cities are always lit up at night by advertisements and such. Piccadily circus in London is famous for its birghtly lit advertisements.

How about using phosphorescent inks in new and unusual ways to create another form of dark to light advertising?

Below is a nice project; a glow in the dark moon table. Im sure we’d all want one of these somewhere round the house? or maybe not?

I’d like to research phosphorescent inks anyway.