Longer workdays and higher levels of productivity were enhanced by assembly lines and light bulbs. 

Example: Henry Ford's Model T - Introduction of the Assembly line- increased production of automobiles - By 1925, a car was assembled in less than 10 seconds. 

Use of Henry Ford's electric conveyor belt led to an increase in productivity and in turn, consumers benefited from lower prices. 

Increased the number of unskilled laborers.