condition mean min max 4 h after light 12.51975 12.4366 12.6029 8 h after light 10.711665 8.78983 12.6335 12 h after light 8.05247 7.98811 8.11683 4 h after dark 12.79075 12.5368 13.0447 8 h after dark 12.4391 11.0098 13.8684 12 h after dark 13.0365 12.194 13.879