condition mean min max 4 h after light 1484.6 1484.6 1484.6 8 h after light 1492.2 1490.4 1494.0 12 h after light 1924.0 1266.6 2581.4 4 h after dark 2498.65 2323.8 2673.5 8 h after dark 2759.5 2527.9 2991.1 12 h after dark 3305.0 3162.4 3447.6