condition	mean	min	max
4 h after light	7.873	7.733210000000001	8.00259
8 h after light	7.806606666666667	7.6292100000000005	8.05575
12 h after light	7.89234	7.75501	8.16182
4 h after dark	7.86111	7.626010000000001	8.18873
8 h after dark	7.811883333333333	7.59358	7.98301
12 h after dark	7.8497200000000005	7.6653199999999995	8.09946