condition	mean	min	max
0 h after light	20.351	19.4238	21.2782
4 h after light	17.884050000000002	17.8343	17.9338
8 h after light	14.61205	12.9261	16.298
4 h after dark	20.430349999999997	20.3037	20.557
8 h after dark	19.85705	18.7594	20.9547
12 h after dark	18.82775	17.4341	20.2214