Many years ago I stumbled across this number and it bothered me. 1,369. I loved the book and read it closely. Ellison wasn't arbitrary; it had to mean something. So I spent more than a dozen hours trying to figure it out.
On this mini site I'll give you a few clues so you can figure out the answer yourself. It should take you about 3 minutes to read the whole thing.
Clue 1
UPDATE: Here's a short video that explains everything even better than this site:
Light bulbs in Ralph Ellison's Invisible Man.