condition	mean	min	max
0 h after light	20.76715	20.0861	21.4482
4 h after light	15.452350000000001	14.7178	16.1869
8 h after light	15.37635	14.8138	15.9389
4 h after dark	18.3559	15.8265	20.8853
8 h after dark	16.480649999999997	16.1406	16.8207
12 h after dark	19.195	18.2397	20.1503