condition	mean	min	max
0 h after light	18.80085	17.7731	19.8286
4 h after light	20.14255	19.0521	21.233
8 h after light	15.876999999999999	14.6881	17.0659
4 h after dark	18.6814	17.1612	20.2016
8 h after dark	17.7603	17.1523	18.3683
12 h after dark	17.7011	16.5752	18.827