condition mean min max 4 h after light 2.2330449999999997 1.93277 2.53332 8 h after light 1.66983 1.51138 1.82828 12 h after light 1.93983 1.88096 1.9987 4 h after dark 3.097485 2.54671 3.64826 8 h after dark 2.914355 2.72452 3.10419 12 h after dark 2.28486 2.25695 2.31277