condition mean min max 4 h after light 6.770573333333333 4.28817 9.79699 8 h after light 4.95959 1.35095 8.75252 12 h after light 6.2905 3.82859 8.71459 4 h after dark 8.823513333333334 6.83247 10.099 8 h after dark 7.479733333333334 5.92128 8.65691 12 h after dark 8.43489 7.56855 8.91457