condition	mean	min	max
4 h after light	19.69575	17.7767	21.6148
8 h after light	18.896250000000002	18.754	19.0385
12 h after light	18.55775	17.8321	19.2834
4 h after dark	19.680799999999998	19.5626	19.799
8 h after dark	20.2849	20.0698	20.5
12 h after dark	21.783549999999998	21.4676	22.0995