condition mean min max 4 h after light 2341.8 2341.8 2341.8 8 h after light 1930.15 1528.4 2331.9 12 h after light 1186.95 498.0 1875.9 4 h after dark 645.65 603.9 687.4 8 h after dark 849.25 740.8 957.7 12 h after dark 1602.55 1032.6 2172.5