Question

Power Rated on a bulb is 9W. what do you mean by it?​

Answer 1

The meaning of 9W=75W is that the LED lightbulb consumes only 9W of electric power to produce the same light output (luminous flux) as would be produced by a 75W tungsten-filament incandescent lightbulb.

Answer 2

All light bulbs have a wattage rating.It follows that higher the voltage, the greater amount of electrical consumption or electricity used,thus the more it will cost to run the light bulb.