condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.10873 0.0 0.21746 8 h after light 0.109105 0.0 0.21821 4 h after dark 0.217474 0.0 0.434948 8 h after dark 0.108612 0.0 0.217224 12 h after dark 0.0 0.0 0.0