condition mean min max 4 h after light 0.01439645 0.0 0.0287929 8 h after light 0.0157435 0.0 0.031487 12 h after light 0.0190434 0.0 0.0380868 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0