condition	mean	min	max
4 h after light	5.96303	5.33054	6.59552
8 h after light	6.133635	5.76004	6.50723
12 h after light	6.502065	6.3579	6.64623
4 h after dark	9.46277	9.04418	9.88136
8 h after dark	9.576285	9.29043	9.86214
12 h after dark	9.63097	9.10334	10.1586