condition mean min max 4 h after light 163.155619 149.647455 176.663783 8 h after light 146.426335 145.499001 147.353669 12 h after light 128.6396395 116.894657 140.384622 4 h after dark 169.9977145 135.223296 204.772133 8 h after dark 217.228769 142.678185 291.779353 12 h after dark 231.529451 231.529451 231.529451