condition	mean	min	max
0 h after light	15.36795	14.8492	15.8867
4 h after light	6.92499	6.31651	7.53347
8 h after light	8.10277	7.98735	8.21819
4 h after dark	12.91415	10.9025	14.9258
8 h after dark	11.3352	11.3115	11.3589
12 h after dark	14.70805	12.8591	16.557