condition	mean	min	max
4 h after light	16.17395	13.6637	18.6842
8 h after light	20.43835	17.9434	22.9333
12 h after light	18.8043	18.4217	19.1869
4 h after dark	32.824	29.7916	35.8564
8 h after dark	19.01345	18.8595	19.1674
12 h after dark	27.22135	27.0436	27.3991