condition mean min max 4 h after light 12.671050000000001 10.6493 14.6928 8 h after light 10.93455 10.541 11.3281 12 h after light 11.734449999999999 11.3466 12.1223 4 h after dark 18.241266666666668 17.7694 18.8751 8 h after dark 16.252033333333333 14.5154 17.2004 12 h after dark 15.871433333333334 14.578 16.6889