condition mean min max 0 h after light 0.0 0.0 0.0 2 h after light 0.301068 0.0 0.602136 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 2 h after dark 0.0 0.0 0.0 4 h after dark 0.2997775 0.0 0.599555 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0