Ví dụ về việc sử dụng Incandescents trong Tiếng anh và bản dịch của chúng sang Tiếng việt
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Incandescents also don't last as long as CFLs and LEDs.
That's $500 over 20 years for halogen incandescents or $125 over 20 years for the LEDs.
Halogen incandescents give off the same light as traditional incandescents, but use 28 percent less energy.
This means that for every one LED light bulb you buy,you would need to buy 20 incandescents to cover the same period.
Halogen incandescents have a capsule inside that holds gas around a filament to increase bulb efficiency.
Comparable CFLs that consume about 14 watts come to $1.17 per year andabout $5 a year for 60-watt incandescents in that scenario.
Even though LEDs run considerably cooler than halogens and incandescents, the little heat they produce still needs to be dispelled.
LED lights are 300% more efficient than compact fluorescent lights(CFLs)and 1,000% more efficient than incandescents.
Now that LEDs and CFLs are priced closely to traditional and halogen incandescents, their long-term value is clearly superior.
If you replace your incandescents or halogens with an LED with an average CRI rating, you may notice colors appear a little lackluster.
LED bulbs marketed as incandescent replacements usually have a color temperature of 2700 K,which is equivalent to typical warm white incandescents.
They use 90% less energy than traditional incandescents and can sometimes pay for themselves through energy savings in just a couple of months.
Today, however, CFLs have become much more affordable(you can get them for roughly $1.74 a bulb)and 75% more efficient than traditional incandescents.
Price: Because they use less energy,LEDs will save money over incandescents, halogens, and, because they last longer, than compact florescent bulbs.
For incandescents, there is an accepted correlation between the watts drawn and the brightness, but for LEDs, watts aren't a great predictor of how bright the bulb will be.
Because they use less energy,LEDs will save money over incandescents, halogens, and, because of they last longer, than compact fluorescent bulbs, too.
Some LEDs can last two decades(or even longer) with average use before they begin to dim,as opposed to an approximate two year life for incandescents.
It should be noted that, beginning in 2020, incandescents that cannot meet a 45 lumens per watt efficacy minimums are being phased out by the Department of Energy.
According to IHS Market, a consultancy, LED lighting uses an average of 40 percent less power than fluorescents,and 80 percent less than incandescents, to produce the same amount of light.
Because they use less electricity than traditional incandescents, typical Compact fluorescent lamps(CFL) can pay for themselves in less than nine months and then start saving you money each month.
If there's a place that's tough to reach and you want to avoid replacing the bulb,LED is certainly a better choice than traditional incandescents or halogens, which burn out faster.
Compact fluorescent lamps(CFLs) undoubtedly use less energy than incandescents, and replacing old bulbs with CFLs will surely save on utility bills.
The development of a steadily glowing filament suitable for interior lighting took longer, but by the early twentieth century inventors had successfully developed options,replacing the arc light with incandescents.
With incandescent light bulbs in the process of being phased out around the world, LEDs are one of the most promising technologies for taking over our day-to-day lighting needs- they use less energy, provide more light, contain less toxic substances,and are tougher than incandescents.