condition	mean	min	max
4 h after light	15.17261	5.73343	25.9098
8 h after light	9.183406666666666	1.63639	16.8222
12 h after light	11.41189	5.50703	18.9535
4 h after dark	18.2084	11.5188	23.3623
8 h after dark	19.0291	12.1192	25.5158
12 h after dark	23.445466666666665	13.6541	36.5751