condition	mean	min	max
4 h after light	18.9361	15.6025	22.2697
8 h after light	11.80835	11.473	12.1437
12 h after light	12.94915	11.4886	14.4097
4 h after dark	19.15755	18.4516	19.8635
8 h after dark	22.426000000000002	22.1241	22.7279
12 h after dark	26.73205	25.6015	27.8626