condition mean min max 4 h after light 1.0146895 0.725679 1.3037 8 h after light 0.7790845 0.695584 0.862585 12 h after light 0.6902595 0.62928 0.751239 4 h after dark 0.5534 0.474276 0.632524 8 h after dark 0.974361 0.928892 1.01983 12 h after dark 1.355225 1.24825 1.4622