condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0840605 0.0 0.168121 8 h after light 0.08435 0.0 0.1687 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