Yes, you definitely can, as long as they come with an IP rating. This ensures that the tube heater you’re about to purchase has some level of waterproofing to protect them from accidental water sprays inside your bathroom. After all, there might be times when water might be present and hit your tube heater. QBIC’s range of tube heaters all come with an IP rating of IPX4 or better.
They can also help make certain spots in your bathroom warmer which is very much welcome during colder winter nights.