condition	mean	min	max
4 h after light	7.366723333333333	7.126469999999999	7.618239999999999
8 h after light	7.180796666666667	6.89187	7.52181
12 h after light	7.12967	6.77084	7.330080000000001
4 h after dark	7.35774	7.1147	7.5649
8 h after dark	7.5642966666666664	7.481660000000001	7.658739999999999
12 h after dark	7.7097500000000005	7.5147	7.83588