The tungsten lamps first made were very delicate, and it was not until W.D.Coolidge, in the research laboratories of the General Electric Company at Schenectady, invented a process for producing ductile tungsten that they became available for general use.
The dynamo and the central power station brought the electric motor into action.

The dynamo and the motor do precisely opposite things.
The dynamo converts mechanical energy into electric energy.

The motor transforms electric energy into mechanical energy.

But the two work in partnership and without the dynamo to manufacture the power the motor could not thrive.

Moreover, the central station was needed to distribute the power for transportation as well as for lighting.
The first motors to use Edison station current were designed by Frank J.
Sprague, a graduate of the Naval Academy, who had worked with Edison, as have many of the foremost electrical engineers of America and Europe.
These small motors possessed several advantages over the big steam engine.