condition	mean	min	max
4 h after light	19.697764	18.243605	21.151923
8 h after light	15.643986	15.236749	16.051223
12 h after light	19.1893935	18.204486	20.174301
4 h after dark	15.882825	15.104146	16.661504
8 h after dark	17.9004025	16.264891	19.535914
12 h after dark	24.803376	24.803376	24.803376