condition	mean	min	max
4 h after light	7.417343333333333	7.3251100000000005	7.5063699999999995
8 h after light	7.323836666666667	7.19688	7.4683600000000006
12 h after light	7.367073333333334	7.18998	7.59513
4 h after dark	7.11791	6.91621	7.3842
8 h after dark	7.005416666666666	6.9181	7.05651
12 h after dark	6.8904499999999995	6.77818	6.95067