condition	mean	min	max
4 h after light	18.6844955	18.194481	19.17451
8 h after light	17.924984000000002	17.181888	18.66808
12 h after light	18.0202745	16.453854	19.586695
4 h after dark	19.482437	17.309802	21.655072
8 h after dark	17.622543999999998	17.535781	17.709307
12 h after dark	18.84016	18.84016	18.84016