If your flight is in the coming days, LH153 is expected to arrive at 19:55 or 20:05 depending on the day. In any case, I would not like the stress of such a short connection. Late afternoon LH flights can be delayed if the aircraft has accumulated delays during the day. There are many other commuter flights before LH153, I would strongly suggest changing that flight.
If your flight is in a few months, you also run the risk that TG reschedules to an earlier schedule.