condition	mean	min	max
4 h after light	19.7851	18.0447	21.5255
8 h after light	16.183	15.449	16.917
12 h after light	17.82425	17.5772	18.0713
4 h after dark	20.242333333333335	18.5517	22.1434
8 h after dark	18.494366666666668	16.5074	19.7191
12 h after dark	17.7375	16.3356	19.4911