condition	mean	min	max
4 h after light	2.088065	0.0	4.17613
8 h after light	6.22325	3.3835	9.063
12 h after light	2.06616	0.0	4.13232
4 h after dark	18.18975	18.0592	18.3203
8 h after dark	9.03406	3.58812	14.48
12 h after dark	12.565624999999999	7.12775	18.0035