condition	mean	min	max
4 h after light	20.35755	18.1054	22.6097
8 h after light	18.4377	17.7642	19.1112
12 h after light	19.1051	17.8752	20.335
4 h after dark	22.17825	20.5171	23.8394
8 h after dark	21.7872	21.0302	22.5442
12 h after dark	21.4617	21.4015	21.5219