The wafer, as what Torchstar calls it and they are extremely light. I could not find any specification on weight but I doubt it could ever cause the ceiling panel to sag. You can get thin strips of wood to place under the clips to spread the weight out. I would support the driver somehow above the ceiling panel if the wire is long enough. It is not listed but I’m assuming it is direct wire and that is where any weight could come from. Proper support of the AC wire or whips from a juncture box to the driver would be needed to keep weight off the ceiling panels.