condition mean min max 4 h after light 2543.8 2543.8 2543.8 8 h after light 2425.5 2326.2 2524.8 12 h after light 2367.75 2327.6 2407.9 4 h after dark 2395.75 2378.4 2413.1 8 h after dark 2411.5 2386.5 2436.5 12 h after dark 2292.95 2189.8 2396.1