condition mean min max 0 h after light 2.25882 1.84588 2.67176 4 h after light 1.065866 0.817512 1.31422 8 h after light 0.13935655 0.0911481 0.187565 4 h after dark 0.3184065 0.180966 0.455847 8 h after dark 1.273749 0.823508 1.72399 12 h after dark 2.45109 1.93212 2.97006