condition	mean	min	max
0 h after light	19.41365	18.889	19.9383
4 h after light	16.8278	15.4529	18.2027
8 h after light	22.21105	20.9278	23.4943
4 h after dark	19.9525	19.7274	20.1776
8 h after dark	16.8962	14.8367	18.9557
12 h after dark	18.722250000000003	18.7173	18.7272