condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.03473295 0.0 0.0694659 4 h after dark 0.03079715 0.0 0.0615943 8 h after dark 0.04537225 0.0304268 0.0603177 12 h after dark 0.0 0.0 0.0