condition mean min max 4 h after light 6.500730000000001 5.19927 7.80219 8 h after light 8.178625 7.87513 8.48212 12 h after light 7.666235 6.96625 8.36622 4 h after dark 8.31359 6.6048 9.96611 8 h after dark 10.610246666666667 9.91826 11.9815 12 h after dark 6.796783333333334 6.05334 7.78456