condition mean min max 4 h after light 5.71656 5.64735 5.82271 8 h after light 5.640149999999999 5.5370099999999995 5.70022 12 h after light 5.767863333333334 5.67185 5.89101 4 h after dark 5.84838 5.55199 6.27272 8 h after dark 5.544373333333333 5.3274099999999995 5.7736 12 h after dark 5.702176666666667 5.6493400000000005 5.7563