condition mean min max 4 h after light 5519.4 5519.4 5519.4 8 h after light 5727.5 5686.7 5768.3 12 h after light 5072.35 5066.8 5077.9 4 h after dark 4399.65 4351.7 4447.6 8 h after dark 4129.7 3820.2 4439.2 12 h after dark 4345.35 4265.7 4425.0