Hi That will depend on the type of led tube you prefer. However, it is necessary to lower the ceiling to make modifications to the internal circuit according to the tube. What I mean is that it is not enough to remove a fluorescent lamp and place a LED. For aesthetic reasons and since it is necessary to remove it anyway, I recommend placing a new ceiling but if it is a special ceiling and you want to keep it, it can be done without any problem (in that case the tube should be compatible) Cheers