condition mean min max 4 h after light 1.5146626666666667 0.377788 2.49716 8 h after light 1.597509 0.542377 2.62441 12 h after light 1.6175983333333335 0.982945 2.50443 4 h after dark 1.83333 1.28755 2.52202 8 h after dark 1.439324 0.765812 2.33497 12 h after dark 1.60445 1.4765 1.81461