condition	mean	min	max
4 h after light	7.90784	7.58168	8.27406
8 h after light	9.025743333333335	8.91437	9.08505
12 h after light	7.858840000000001	7.6814800000000005	8.148710000000001
4 h after dark	7.2316	7.197430000000001	7.2961
8 h after dark	6.2767333333333335	5.96381	6.62317
12 h after dark	5.289913333333333	5.13167	5.57661