condition	mean	min	max
4 h after light	20.48135	19.0826	21.8801
8 h after light	17.129550000000002	14.7825	19.4766
12 h after light	12.5205	11.8351	13.2059
4 h after dark	23.408066666666667	22.604	23.8608
8 h after dark	27.2379	25.4328	29.1938
12 h after dark	29.6593	26.315	33.5287