condition	mean	min	max
4 h after light	8.55137	7.73409	9.36865
8 h after light	3.390245	2.84536	3.93513
12 h after light	1.948245	1.4734	2.42309
4 h after dark	12.716166666666668	11.3411	13.73
8 h after dark	16.578400000000002	15.2704	18.3951
12 h after dark	20.641633333333335	18.5651	22.7466