condition	mean	min	max
4 h after light	6.894446666666667	6.80987	7.023110000000001
8 h after light	6.7600766666666665	6.6611899999999995	6.86647
12 h after light	6.826456666666667	6.81606	6.84225
4 h after dark	6.9345099999999995	6.78068	7.11485
8 h after dark	6.86807	6.787910000000001	6.9385699999999995
12 h after dark	6.946020000000001	6.833710000000001	7.059130000000001