Revolution of "LED"blubs in lighting process

Now a days, we are more cautious about the global warming. Today energy is as valuable as that of the "Yellow metal"- gold and platinum.So the crying need of the hour is to adopt more effective ways to reduce the spending of electric energy.Atomic energy is not cheap as that of hydro power and solar power. By the cost of an atomic energy, we can easily build three or more big hydro electric power generators.But both will create environmental problems in the area.
In lieu of it, we can replace all the candescent bulbs with the new LED bulbs.These LED bulbs will takes only 3watt power while the 60watt power of the candescent bulbs.We can easily calculate the energy saved by adopting this simple method.There are more than 15 billion candescent bulbs in the world. It will take 15Billion * 60 * 5 (average time of burning per day).If all these bulbs are replaced with LED bulbs of 3watt,then the energy needed is only 15 Billion*3*5. This huge savings of energy from the consumption will save the globe from warming.
Huge amount of money also can be saved .Governments of all countries should make urgent legislation for replacement of filament bulbs.At the same time subsidies have to be given to purchase the new bulbs (light emitting diode bulbs).