Attempting to connect two #14 ground wires to a single ground screw in
single-tube Lithonia fluoresecent fixtures joined end-to-end resulted in
stripping the screw threads in the sheet steel fixture. Is it acceptable to
substitute the next larger size of self-tapping machine screw. Of course it
won't be green and will be cadmium or zinc plated.

Alternatively, a longer ground might be screwed through a nut on the
backside of the fixture but this would be inconvenient.

David Merrill