condition mean min max 3 h after light 0.075508 0.0 0.226524 6 h after light 0.0 0.0 0.0 9 h after light 0.0 0.0 0.0 12 h after light 0.0171606 0.0 0.0686424 3 h after dark 0.0 0.0 0.0 6 h after dark 0.07354866666666666 0.0 0.220646 9 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0