condition	mean	min	max
4 h after light	4.076163333333333	3.9108099999999997	4.19086
8 h after light	4.12365	4.1158	4.12961
12 h after light	4.108446666666667	4.04079	4.19384
4 h after dark	4.116943333333333	4.04738	4.2298
8 h after dark	4.04245	3.9222599999999996	4.13912
12 h after dark	4.05945	4.00272	4.11736