This is a common question, and the answer is that, yes, you can replace an old light fixture with a new one. However, there are some important things to keep in mind when making this decision. First, it's important to make sure that the new fixture has the same wattage as the old one. Second, make sure that the connection points between the new fixture and the wires in your ceiling are identical to those of the old fixture. Finally, be sure to get a UL Type A LED tube for your new fixture—these lights use a fraction of the energy of typical incandescent bulbs.