LED has a longer life and higher energy efficiency, which makes it a little costly to produce as compared to the typical fluorescent and incandescent lamps. But what LED manufacturers and producers always highlight is how the LED produces as much lumen as conventional light bulbs but with lower wattage.
Lumens are what manufacturers and producers use to measure the output of brightness. This means that LED bulbs can be as bright as or even be brighter than fluorescent and incandescent light bulbs but because it uses less wattage, it requires less energy.