condition	mean	min	max
0 h after light	20.3497	19.8817	20.8177
4 h after light	17.1278	16.4221	17.8335
8 h after light	15.6711	15.125	16.2172
4 h after dark	19.4333	18.6651	20.2015
8 h after dark	20.15985	20.1137	20.206
12 h after dark	18.58445	16.8914	20.2775