condition mean min max 4 h after light 7466.4 7466.4 7466.4 8 h after light 9103.15 6074.8 12131.5 12 h after light 6204.65 4819.0 7590.3 4 h after dark 5631.05 3762.8 7499.3 8 h after dark 5752.45 5524.2 5980.7 12 h after dark 5332.85 4449.6 6216.1