Larry,
I just sold my only engine that was equipped with a strobe. One of the members at our, now defunct, club installed it for me. I'm not an electronics-savvy guy. I think that he used something called a "discharge capacitor". I don't know the schematics, but the light itself was an LED. Again, I wish I was more knowledgeable on the subject, but I'm not. The light did work on DC, but am ignorant as to how.
I would think that FO would be a bit tougher. You would need a source of light. Under most shells, space is at a premium. Might be a tad hard to find the needed area to install the light source.
Bob