condition mean min max 4 h after light 1.53498 1.01802 2.05194 8 h after light 2.77576 2.22655 3.32497 12 h after light 0.67331 0.0 1.34662 4 h after dark 1.3438405 0.887341 1.80034 8 h after dark 2.211605 1.77868 2.64453 12 h after dark 2.856865 2.21151 3.50222