condition mean min max 4 h after light 2.19515 2.0212 2.3691 8 h after light 1.836475 1.68176 1.99119 12 h after light 3.315525 2.81892 3.81213 4 h after dark 4.001175 3.88524 4.11711 8 h after dark 3.1104900000000004 2.94865 3.27233 12 h after dark 2.95678 2.89094 3.02262