condition mean min max 4 h after light 0.797858 0.688431 0.907285 8 h after light 0.55942 0.405378 0.713462 12 h after light 1.17606 1.0562 1.29592 4 h after dark 2.78985 2.72334 2.85636 8 h after dark 2.2097 1.96615 2.45325 12 h after dark 1.612495 1.48022 1.74477