condition	mean	min	max
4 h after light	10.125605	9.77801	10.4732
8 h after light	12.5168	11.8555	13.1781
12 h after light	16.9788	16.9509	17.0067
4 h after dark	20.752133333333333	19.9889	21.6513
8 h after dark	19.155266666666666	17.5559	21.9957
12 h after dark	13.6087	11.7444	16.4057