condition	mean	min	max
0 h after light	9.395775	9.3874	9.40415
4 h after light	4.67933	3.18835	6.17031
8 h after light	11.058945	6.19159	15.9263
4 h after dark	20.0123	18.5121	21.5125
8 h after dark	4.66167	0.0	9.32334
12 h after dark	4.687395	0.0	9.37479