condition mean min max 4 h after light 1.5033699999999999 1.47425 1.53249 8 h after light 3.079035 2.73014 3.42793 12 h after light 3.0712900000000003 2.91757 3.22501 4 h after dark 3.11937 3.03583 3.20291 8 h after dark 2.469335 2.35239 2.58628 12 h after dark 2.09194 1.9672 2.21668