condition mean min max 4 h after light 3998.7 3998.7 3998.7 8 h after light 4133.05 3158.3 5107.8 12 h after light 3182.0 2095.7 4268.3 4 h after dark 2179.95 1709.6 2650.3 8 h after dark 2611.95 2486.4 2737.5 12 h after dark 4147.95 3903.5 4392.4