condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0870945 0.0 0.174189 12 h after light 0.0 0.0 0.0 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0