condition mean min max 4 h after light 3693.2 3693.2 3693.2 8 h after light 3213.1 3074.7 3351.5 12 h after light 2721.3 2473.9 2968.7 4 h after dark 2515.25 2484.5 2546.0 8 h after dark 2906.45 2404.6 3408.3 12 h after dark 3593.65 3399.8 3787.5