condition	mean	min	max
4 h after light	19.404400000000003	17.3963	21.4125
8 h after light	15.54935	15.0277	16.071
12 h after light	16.9717	16.1956	17.7478
4 h after dark	20.274433333333334	19.8758	20.8784
8 h after dark	24.1636	23.3737	25.3232
12 h after dark	20.754	18.5252	24.0579