condition mean min max 4 h after light 3681.3 3681.3 3681.3 8 h after light 2979.05 2669.1 3289.0 12 h after light 3301.4 2528.4 4074.4 4 h after dark 4085.95 3723.1 4448.8 8 h after dark 3707.45 3258.5 4156.4 12 h after dark 3623.7 3444.0 3803.4