condition mean min max 0 h after light 7.7814250000000005 7.08645 8.4764 4 h after light 5.163959999999999 5.15724 5.17068 8 h after light 6.023745 5.773 6.27449 4 h after dark 6.78205 6.2886 7.2755 8 h after dark 6.785235 6.72661 6.84386 12 h after dark 6.958935 6.73174 7.18613