condition	mean	min	max
4 h after light	6.89347	6.78525	7.02222
8 h after light	6.968223333333333	6.76055	7.28915
12 h after light	6.8847966666666665	6.663469999999999	7.08626
4 h after dark	6.77436	6.700660000000001	6.87855
8 h after dark	6.642416666666667	6.34186	7.021889999999999
12 h after dark	6.86301	6.78511	6.9061699999999995