How many times did thomas edison mess up the light bulb

Thomas Alva Edison was a North American scientist and inventor who is credited with the design of the electric bulb and many other patented inventions.

However, the bulb did not come out on the first attempt, and was sometimes questioned by his repeated "failures". But his patience and perseverance paid off, after approximately 10,000 attempts, he managed to obtain an incandescent bulb that would last for a long time.

It should be noted that Edison was once asked if he considered that he had had many failures before making the bulb work, hence his famous phrase:

That is why Edison is considered an example of perseverance.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000