Now a days LED light bulbs are becoming more and more popular because they have several advantages. Some of their advantages are listed below·         Their energy (electrical) consumption is much more less·         Their luminance is more·         Their intensity can be varied·         Their life time is moreSo if LED lights are used in place of conventional lights we can save much more electrical energy that leads to saving of conventional energy sources like coal, petrol, diesel etc. Also the light intensity of LED can be varied as per ambient light. That is one more plus point in saving electrical energy. We can set the light intensity to required level and get dual advantage of having exact amount of luminous and saving of energy.