condition mean min max 4 h after light 10731.6 10731.6 10731.6 8 h after light 8152.95 7854.1 8451.8 12 h after light 6379.65 5556.6 7202.7 4 h after dark 4174.75 3938.4 4411.1 8 h after dark 6066.65 3370.0 8763.3 12 h after dark 7620.450000000001 6204.8 9036.1