condition mean min max 4 h after light 86.4477 85.1349 87.7605 8 h after light 74.18385 72.8771 75.4906 12 h after light 75.92985 74.8815 76.9782 4 h after dark 103.227 100.22 106.234 8 h after dark 97.35015 97.1237 97.5766 12 h after dark 105.8055 96.173 115.438