Monday, April 1, 2013

Three aspects to tell you why LED lights can save energy?

Before LED lights, people have CFL to cut their home energy bill.Now, it’s led lighting generation, many country issued policies recommends their residents using led lights, traditional incandescent lamps banned.

Comparing with LED, CFL is not very safe, because its mercury vapor would always be a latent danger to any of its users.LED have more advantages than CFL,and it’s environmental influence is lesser than CFL,can be considered a rather clean  Luminaries.

People always deem LED’s energy saving on its high lumen flux, for example: 5W replace traditional light 60W,so can save more energy.Actually,lumen flux is only one of the influencing factor relating with LED’s energy saving, the other two can be listed below:

Long lifespan: Why lifespan save energy? Led’s average lifespan 50,000 hours comparing with fluorescent/CFL’s 3,000 hours. 16.6 times higher than fluorescent/CFL. If “A” stands for LED light,”B” stands for CFL or fluorescent, we can make a equation below:

(1)    A’s lifespan=16.6 ×B’s lifespan
(2)    Energy usingCFL is about 40lm/w,LED is about 80lm/w,the energy saving equation can be made below
A’s energy using=1/2 B’s energy using in one hour
See lifespan how to save your energy
As A’s lifespan is 16.6 times longer than B. so total energy A can save will be 1/2 ×16.6=0.030(3/100), which means A can save 97% above B’s energy. That’s an incredible figure. Please note: this is only LED on energy’s side, do not include other cost, apparently, we can notice, if make B last as long as A, should have 17 B,if each B cost usd 1,17 times would cost 17dollars don not including replacement ,transportation cost interim.

Power factor: Power factor relates the power using efficient, the higher the power factor, more power would be used for the light, which means more energy can be useful to contribute the lighting instead of others. Led lights can have a power factor above 0.9,which means 90% electricity power are used for the lighting, only 10% for others. Traditional lights have a very low Power factor, many electricity power are wasted on generating useless heat or others.

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