condition mean min max 4 h after light 3806.3 3806.3 3806.3 8 h after light 3922.25 3886.8 3957.7 12 h after light 3547.3 3197.1 3897.5 4 h after dark 3145.35 3009.0 3281.7 8 h after dark 3601.3 3016.6 4186.0 12 h after dark 4080.9 3967.2 4194.6