condition	mean	min	max
4 h after light	2.266985	2.1043	2.42967
8 h after light	4.8421	4.49474	5.18946
12 h after light	4.47413	4.27802	4.67024
4 h after dark	8.633755	8.37183	8.89568
8 h after dark	6.214375	5.91993	6.50882
12 h after dark	4.70205	4.01604	5.38806