condition	mean	min	max
0 h after light	20.5187	19.7397	21.2977
4 h after light	17.74635	16.7822	18.7105
8 h after light	16.64585	15.705	17.5867
4 h after dark	22.0332	20.9171	23.1493
8 h after dark	22.18855	20.893	23.4841
12 h after dark	19.77055	18.0208	21.5203