condition mean min max 4 h after light 816.1 816.1 816.1 8 h after light 661.25 516.6 805.9 12 h after light 467.75 443.5 492.0 4 h after dark 550.5 389.9 711.1 8 h after dark 1181.7 621.5 1741.9 12 h after dark 1803.95 1327.5 2280.4