condition mean min max 4 h after light 63.5 63.5 63.5 8 h after light 93.25 74.8 111.7 12 h after light 152.7 83.8 221.6 4 h after dark 107.0 71.6 142.4 8 h after dark 145.9 110.7 181.1 12 h after dark 63.35 38.0 88.7