condition mean min max 4 h after light 6.57616 6.10411 7.04821 8 h after light 4.31166 4.20152 4.4218 12 h after light 3.50792 3.34375 3.67209 4 h after dark 4.962596666666666 4.21816 5.36043 8 h after dark 6.74952 6.01902 7.27958 12 h after dark 6.70483 6.50112 7.0653