condition	mean	min	max
4 h after light	18.84855	18.1935	19.5036
8 h after light	15.04725	14.7709	15.3236
12 h after light	14.24905	13.224	15.2741
4 h after dark	15.5564	14.6414	16.4714
8 h after dark	19.58065	19.4287	19.7326
12 h after dark	22.225250000000003	21.5224	22.9281