condition mean min max 4 h after light 0.525798 0.343702 0.707894 8 h after light 0.7900335 0.745763 0.834304 12 h after light 0.6520825 0.47153 0.832635 4 h after dark 0.9716115 0.971555 0.971668 8 h after dark 1.26126 1.12586 1.39666 12 h after dark 1.243685 1.00148 1.48589