condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.091145 0.0 0.18229 8 h after light 0.0 0.0 0.0 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