condition	mean	min	max
4 h after light	3.73209	3.72133	3.74285
8 h after light	2.79942	2.67976	2.91908
12 h after light	4.118025	4.08511	4.15094
4 h after dark	3.60325	3.51109	3.69541
8 h after dark	3.756055	3.57522	3.93689
12 h after dark	3.75166	3.70686	3.79646