condition	mean	min	max
4 h after light	18.162577	15.683166	20.641988
8 h after light	18.9099925	18.780287	19.039698
12 h after light	19.000711000000003	17.369574	20.631848
4 h after dark	20.504157	17.315871	23.692443
8 h after dark	18.518404	18.256521	18.780287
12 h after dark	16.722164	16.722164	16.722164