condition	mean	min	max
4 h after light	6.70012	6.5408599999999995	6.79361
8 h after light	6.59312	6.377759999999999	6.80235
12 h after light	6.7363	6.56843	6.89117
4 h after dark	6.815933333333333	6.61078	7.04815
8 h after dark	6.819139999999999	6.571389999999999	7.12829
12 h after dark	6.878183333333333	6.7981300000000005	6.9842699999999995