condition	mean	min	max
4 h after light	5.036325	4.11763	5.95502
8 h after light	4.895725	4.62257	5.16888
12 h after light	8.436915	8.14886	8.72497
4 h after dark	4.70828	4.17943	5.23713
8 h after dark	5.152685	4.60152	5.70385
12 h after dark	3.946895	3.69768	4.19611