condition	mean	min	max
4 h after light	7.86453	7.648610000000001	7.998010000000001
8 h after light	7.840386666666666	7.653060000000001	8.00335
12 h after light	7.947856666666667	7.91184	7.9933
4 h after dark	8.09403	8.006969999999999	8.159930000000001
8 h after dark	8.19167	8.09109	8.29368
12 h after dark	8.44173	8.05293	8.69848