condition	mean	min	max
0 h after light	8.21334	7.90648	8.5202
4 h after light	12.887104999999998	9.50391	16.2703
8 h after light	19.52975	16.4331	22.6264
4 h after dark	19.59265	19.3665	19.8188
8 h after dark	14.5093	12.8962	16.1224
12 h after dark	7.994505	6.00091	9.9881