condition	mean	min	max
4 h after light	6.968450000000001	6.83483	7.15561
8 h after light	6.928323333333333	6.803939999999999	7.00097
12 h after light	6.805643333333333	6.61521	6.9161399999999995
4 h after dark	7.412176666666666	7.19315	7.717289999999999
8 h after dark	7.4991900000000005	7.19318	7.981380000000001
12 h after dark	8.00966	7.739489999999999	8.266160000000001