@salvabara
"Everything not consumed by humans is a waste" was not really a principle I expected to find in the context of nature preservation. I get the sentiment but I think the wording could use some work.
Also, arguing on the basis of photon numbers seems like begging for someone to reach out of the swamp of IR and pull you down into an unproductive discussion about "what is light anyway".
@tobychev
I am sure you can do better ;) Read our work and, when using quotes, quote what we actually said regarding artificial light :)