There was not flash of light, and Paul doesn't mention anyone else saw anything.

"The men traveling with Saul stood there speechless; they heard the sound but did not see anyone" Acts 9:7

"My companions saw the light, but they did not understand the voice of him who was speaking to me." Acts 22:9

I do think Paul was basically honest.

Except for that part of divine revelation?

"Historical Jesus" does not mean "miraculous Jesus." I think the evidence supports the idea of a historical Jesus.

I know that. I don't think there was even a historical jesus. I am not aware of very much evidence at all of a real person, and what little exists is unreliable and was written decades to centuries later.