Another great discussion. As a career environmental regulator my bottom line is regulation of artificial light much like water and air etc. This could be done in a fairly straightforward manner by the right people. What this discussion reminds me of is the amount of cultural back filling that is needed to get people on board with this need at a grass roots level. I wish this topic was number one on the list of global issues that the World Economic Forum, but it is not. This gets back to the second action item - the need to restore a proper arms length distance between corporations and government rather than the Fascistic top down model where they are all meeting together and high fiving over the next profit making opportunity. Governmnet's role is to implement responsible regulations that benefit the people, not help corporations get richer. Further, as pointed out in this discussions, and I've seen this over and over in the environmental arena, compliance with responsible regulations actually improves business models and makes businesses money. These regulations would ideally be adopted at the State or Federal level, not local but that would take a ton of enlightened leadership that we don't have at this time any where in the world that I am aware of.