Victorian oil lamps, Lamps, and Gone with the Wind lamps are common types which take ball shades. They originated in the kerosene-burning era of the late 1800's using central draft oil burners and were designed to impress guests. The popularity of these lamps
continued well into the advent of electricity and are even today still reproduced
in a variety of styles.
appropriate size of a ball shade is determined by its diameter at the widest
part of the ball. A rule of thumb is that the diameter of the ball should be
equal to, or slightly larger than, the fattest part of the bottom font whether
it be metal or glass.