condition	mean	min	max
4 h after light	8.217386666666666	7.9671199999999995	8.503919999999999
8 h after light	8.22344	8.06305	8.37048
12 h after light	8.175333333333334	7.89712	8.51452
4 h after dark	8.24276	7.893689999999999	8.786610000000001
8 h after dark	8.192456666666667	7.88899	8.679739999999999
12 h after dark	7.90143	7.607480000000001	8.10332