What are the differences between shunted and non-shunted tombstones and how do they affect the performance of lighting fixtures?

Shunted tombstones have internal connections between the two sockets, while non-shunted tombstones do not. This affects the performance of lighting fixtures because shunted tombstones are used with electronic ballasts, while non-shunted tombstones are used with magnetic ballasts. Using the wrong type can cause the fixture to not work properly or even damage the ballast.