condition	mean	min	max
4 h after light	17.39637	17.39637	17.39637
8 h after light	19.7166515	17.074304	22.358999
12 h after light	15.638141000000001	13.879912	17.39637
4 h after dark	16.4111615	15.320295	17.502028
8 h after dark	17.9185065	12.980384	22.856629
12 h after dark	18.556413	18.556413	18.556413