condition	mean	min	max
4 h after light	3.853536666666667	3.7554800000000004	3.9498699999999998
8 h after light	3.79687	3.67675	3.9201
12 h after light	3.7521400000000003	3.7105	3.8046800000000003
4 h after dark	3.8042933333333333	3.78781	3.8263199999999995
8 h after dark	3.83486	3.73831	3.98078
12 h after dark	3.88661	3.7942	4.0615