Signman, I agree with you 100%. Edison did not appear to be an innate/typical creative genius. I don't even think he was that intelligent.
To use Scheele's NB model of receptive, generative, persistent.
He was persistent in the extreme. He gets 10 out of 10 here. He had Trinidad Hunt's Ganus--curiosity, passion, fire, etc.
I think that what he LACKED in natural GENERATIVE genius ability,
he made up for in his RECEPTIVITY breaks--his breakthrough 'idea naps'.
The man knew how to access the power of his subconscious mind 'on demand', whereas Tesla, Einstein, and Faraday seemed to have a more innate and 'constant' generative stream.
So, let's can the natural brilliance of the "Einstein Factor" for moment.
And let's take up the artificial brilliance of the "Edision Factor". 
WHAT IF EDISON HAD GOTTEN 8 HOURS SLEEP EACH NIGHT AND NO NAPS?
THAT is the question!
The more I read and experiment, the more I am convinced that:
"Delta sleep may be the highway to geniushood."
I'll try to explain why I think this is the case as explicitly as I can:
In normal sleep, we go through about 4 or 5 90 minute cycles composed of about 70 minutes NREM (delta) sleep and about 20 minutes REM (theta) sleep.
Cycles! What appears to cause the transition of one stage of sleep to another? Say you are even on Delta resource and Theta resource.
A quick example:
I. Right before bed: Delta = 1%, Theta = 1%
II. Asleep for 70 minutes (NREM) Delta = 5, Theta = 1
III. Asleep for 20 minutes (REM) Delta = 1, Theta = 10
IV. Asleep for 70 minutes (NREM) Delta = 20, Theta = 5
V. Asleep for 20 minutes (REM) Delta = 15, Theta = 40
VI. Asleep for 70 minutes (NREM) Delta = 80, Theta = 30
VII. Asleep for 20 minutes (REM) Delta = 70, Theta = 100
VIII. Asleep for 70 minutes (NREM) Delta = 90, Theta = 90
BOOM! you wake up, because both types of sleep are satiated and the numbers are too close to see-saw back and forth another time.
So, it is an abundance of one type of sleep resource over another that causes the onset of a new stage!
Sleep specialists have known this for a while. Now, my question is how can we leverage this knowledge to both promote genius abilites and to increase the number of waking hours?
By satiating Delta resource to the MAX with continual Delta Meditation, you create a HUGE imbalance. Delta resource is somewhere near 100%, whereas theta resource is somewhere down low.
JUST IMAGINE HOW POTENT IMAGE STREAMING WOULD BE IN SUCH A SCENARIO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
your mind is literally itching to express theta!!! Just lie down for a second and WAM BAM, instant THETA SPIKES off the charts!!! KABOOM!!!!! 
Instant hypnogogia. Instant Genius Power.
Welcome to the Edison Factor... the subject of my next book (i wish). 
Mr. Bissonette, put that in your Genius Code! 
Didn't DaVinci also take only naps?
Is that so? Fascinating... 
I've heard many times that most geniuses are habitual nappers. I'm surprised no one has ever made this connection before! 

Continue the "Feel The Power" discussion here for faster loading. It is enjoyable reading.
cool. I wasn't sure if it was going just a tad off topic from the original post...