condition mean min max 4 h after light 0.9991 0.62622 1.37198 8 h after light 0.545864 0.535941 0.555787 12 h after light 0.681822 0.576246 0.787398 4 h after dark 1.621315 1.0593 2.18333 8 h after dark 0.752359 0.636551 0.868167 12 h after dark 0.6710045 0.63225 0.709759