condition mean min max 4 h after light 2704.4 2704.4 2704.4 8 h after light 2753.65 2476.5 3030.8 12 h after light 1934.45 1549.6 2319.3 4 h after dark 1847.25 1253.7 2440.8 8 h after dark 2467.8 2141.3 2794.3 12 h after dark 2956.85 2543.2 3370.5