condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.0234722 0.0 0.0469444 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0229012 0.0 0.0458024 12 h after dark 0.0 0.0 0.0