condition	mean	min	max
4 h after light	3.8746	3.72406	4.02514
8 h after light	6.6132	5.84496	7.38144
12 h after light	29.220599999999997	28.1058	30.3354
4 h after dark	20.30715	19.8428	20.7715
8 h after dark	15.63725	15.276	15.9985
12 h after dark	7.96081	7.32094	8.60068