a light bulb revolution: cfls and leds replace incandescent bulbs
It is not a political revolution throughout the Arab world.
Not the information revolution that is happening in Silicon Valley.
A light bulb revolutionThink about it.
Thomas Edison and British inventor Sir Joseph Swan independently produced the first reliable, affordable incandescent lamp in about 1880, the invention occupied about 130 in the home lighting industry
Longer than steam.
American railways are dominated by power locomotives.
Even longer than another great family of Edison invented the phonograph, which ruled the recording industry.
But after about 30 years of fading from the phonograph, incandescent lamps seem to be coming soon.
The problem is that the design efficiency of standard incandescent lamps is too low.
The electric heating of the atoms in the filament stimulates the electrons that release light.
In the end, only 10% of the electricity through the bulb actually produces light, and the rest of the electricity is used to heat the filament to more than 4,000 degrees.
President George W, 2007
Bush signed the Energy Independence and Security Act, which increases the efficiency of light bulbs every year. By 2020, screw-
The efficiency of the bulb must be 60-70% higher than today\'s incandescent lamp.
Although the law does not explicitly prohibit incandescent lamps, there are actually 1 feet in the grave.
Manufacturers phase out the oldstyle 100-
As of January, Watt incandescent lamps. 1;
In many places, there are only a few left on the shelves of retailers.
The new model of incandescent lamps meets the modest efficiency requirements of this year, but it is not clear whether the design can meet the 2020 standard.
However, it is not entirely clear what we are going towards when we leave the standard incandescent lamp.
Including compact fluorescent lamps (CFLs)and light-
Meets federal standards.
So which one is best for the environment?
The government gave you a little help in the form of a label.
As of this year, the bulb packaging list is clear (
How much light the bulb produces), watts (
The power required to produce it)
, A brief description of life expectancy and light (
Whatever it means, from \"warm\" to \"cool\".
If you are only interested in your personal energy bill, these tags will do the job.
However, assessing the impact of products on the environment is more important than calculating kilowatts.
The time it consumes during use.
Resources are required to extract raw materials, assemble products, transport and dispose of products.
In fact, this is the main argument against the compact fluorescent bulb a few years ago.
CFLs is a spiral tubular bulb that you might think of when you think of an efficient bulb.
The current stimulates Mercury and ar steam inside the tube, prompting the atom to release ultraviolet rays.
For years, critics of CFLs have argued that although the new led bulbs consume less energy during use, their manufacturing is so complex and strict that they have an environmental impact over their service life(
Almost all new products listed on eco-friendly products face this charge at some point, in some cases more reasonable than others.
For example, considering the absurd internet --
Continue to assert that Hummer is actually better for the environment than a hybrid
Electric vehicles due to the energy needed to make hybrid batteries. )
Since then, analysts have used life cycle analysis to repeatedly prove that the case against CFLs is wrong, a technology that compares the environmental impact of products from production to disposal.
The manufacture of any bulb represents a fraction of the energy it consumes during its service life --
According to the model, it\'s about 2 to 5%-
Therefore, the difference between bulbs is insignificant compared to the energy used during operation.
In addition, the CFL bulb has a life span of about 10 times that of an incandescent bulb, so the effect of manufacture spreads over a longer life span.
Finally, most analysts found that CFLs used
Fourth, the overall energy is equivalent to incandescent lamps.
For savvy bulb buyers, the CFLs are old-fashioned.
Now, LED is attracting the attention of consumers.
Unlike the gas-filled CFLs, the LED bulb is energized by solid semiconductor materials.
This is the same technology as mobile phones and some high-tech products.
Not surprisingly, the same criticism of the use of CFLs --
Manufacturing is such an energy source.
Its strength exceeds the energy saving during the life of the bulb
The led is now being leveled.
This argument proved wrong again.
In February, the Department of Energy released a life cycle analysis comparing led to CFLs and incandescent lamps.
CFLs and led are completed under the residual heat of statistics. (
As expected, the incandescent lamp finished the third one very far away. )
In your home, LEDs use less energy than CFLs, but they are made and packaged with a little more energyintensive.
However, most analysts expect led life efficiency to eventually exceed CFLs.
As with most new products, there is still a lot of room to improve the manufacturing efficiency of LED.
In addition, while CFLs have basically peaked in energy efficiency after decades of patching, we may see more and more efficient LED bulbs entering the market in the next five years(
For example, CFLs are likely to be a cassette for lighting.
They may have beaten the original technique, but their run at the top will be short-lived --lived. )
While energy use is a major issue in most environmental analyses, an additional factor must also be taken into account when discussing bulbs: Mercury.
Critics of the CFL bulb argue that a small amount of mercury in the bulb can cause significant environmental harm at the end of the bulb\'s life.
But if you get a lot of electricity from coal
Many people in the Washington area do
Electricity generated to power the bulb releases more mercury than the bulb contains.
Box stores across the country accept CFLs to recycle their parts, so most of these bulbs have no reason to release mercury into the environment.
In any case, don\'t let the fear of mercury in CFLs drive you back to incandescent: there is no mercury in the LED.
LED bulbs can cause some sticker impact, some of which cost $20 to $45, much more than CFLs.
But given that the best LEDs have been going on for about 20 years now, they should be rewarded in the long run.
Think about how much gas it would save without driving to the store to buy more bulbs.