condition	mean	min	max
4 h after light	4.17532	4.09577	4.26961
8 h after light	4.18528	4.16726	4.20793
12 h after light	4.10943	4.0592	4.16729
4 h after dark	4.15816	4.09234	4.24563
8 h after dark	4.15257	4.14088	4.16783
12 h after dark	4.21881	4.09837	4.28561