I once drilled into the base of a porcelain village piece with a masonry bit to put a light in it (wasn't designed for a light, cavity too small). The base was really thick and I gave up after making about 1/2" depression. If I remember correctly, I used oil in the process and heating was an issue. So I opted to discretely glue a grain of wheat bulb under the roof overhang and painted out the wires that I led to the back. I would experiment, with one of the Dremel wheels for porcelain, on a piece you might pick up at a thrift store . If the piece cracks, you can always glue the thing back together. If light bleeds through the repaired crack, paint over the filled crack with acrylics to obtain whatever level of translucence or opacity you need, thin layers of paint at a time, while the piece is illuminated.