condition mean min max 4 h after light 9.287263333333334 8.94641 9.5672 8 h after light 9.61335 9.37365 9.91737 12 h after light 10.367826666666666 10.12525 10.510069999999999 4 h after dark 9.446823333333333 8.67442 9.93666 8 h after dark 9.31528 8.90777 9.59212 12 h after dark 8.94546 8.55814 9.35518