condition	mean	min	max
4 h after light	7.0010666666666665	6.57931	7.3034
8 h after light	7.274523333333333	7.15124	7.36883
12 h after light	7.1636299999999995	6.942189999999999	7.2854399999999995
4 h after dark	7.15302	6.99366	7.291519999999999
8 h after dark	7.19563	6.97775	7.43191
12 h after dark	7.282866666666666	7.1985399999999995	7.33732