Are Environment Friendly LED Bulbs Worth the Value? > 자유게시판

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At this level, LED bulbs are the hybrid vehicles of lighting. They're cheaper to function but value extra upfront than their less-efficient cousins. There have been LED spotlights and smaller lights for years, but now individuals can buy LED bulbs that give out as much light as a 60-watt incandescent and are designed to be used nearly anyplace. And slightly than purchase them on-line or in a specialty store, they will be obtainable at Home Depot, Lowes, and little doubt other acquainted retail outlets next yr. Weighing cost and light quality, LEDs are worth contemplating proper now for EcoLight downlights and price retaining an eye on you probably have quite a lot of incandescent bulbs. If you already have plenty of CFLs in places like desktop lamps, do not count on a quick payback by switching over. However LEDs provide some other advantages, notably longer life. Lighting your living house is clearly a very private determination, however as you think about upgrading with vitality efficiency in thoughts, here are a number of elements to think about.

The good news on LEDs are that these lights, quality-wise, are fairly good and so they put out sufficient light for a lot of needs. However there isn't any getting round the truth that LED bulbs for common lighting are a brand new expertise that comes with a value premium. Home Depot's 800 lumen Philips LED bulb is priced at just under $40 and consumes 12 watts. A 40-watt equivalent from Lighting Sciences Group, which consumes less than eight watts, costs just below $18. In case you were considering shifting en masse to LEDs, EcoLight you'd have to take a long view from a financial perspective. Osram Sylvania figures that placing its $39.98 LED in to change a 60-watt incandescent will save $132 over the life of the bulb, assuming a value of electricity at 10 cents per kilowatt-hour. That is greater than 25,000 hours, or 17 years of using a bulb four hours a day.

Taking a extra conservative, quick-term view, I did some back-of-the envelope calculations. When you used a bulb for simply two hours a day and paid the national average of 11.5 cents per kilowatt hour, a single 12-watt LED will cost you about $1 per 12 months. Comparable CFLs that eat about 14 watts come to $1.17 per yr and EcoLight about $5 a year for 60-watt incandescents in that state of affairs. The minimal energy savings you get from going from CFL to LEDs displays that LED bulbs are solely barely extra efficient, when measured on lumens per watt. And, of course, CFLs have come way down in worth over the previous few years, whereas LEDs are still at the top of a projected downward cost curve. In case you have incandescent bulbs, saving $4 a year with an LED is extra compelling, but that's nonetheless a long pay again. Electricity prices fluctuate quite a bit (see right here for your state common) within the U.S.

For instance, if you use an LED bulb four hours a day and pay a better rate of sixteen cents per kilowatt hour, you'd save $11 per yr per bulb over an incandescent, supplying you with a payback timeframe for a $forty LED of between three and 4 years. Obviously, these savings get greater, the more bulbs you replace. Extra important is that LEDs have a stated life time of 25,000 hours or EcoLight extra, compared to about 8,000 for CFLs, and less than 1,000 for incandescents. So in the event you think about replacements, the numbers look more favorable. Needless to say LEDs are on a faster efficiency and price-improvement track than different lighting applied sciences. Some lighting business executives anticipate the price for an 800-lumen LED bulb to fall to about $20 inside two years, which changes the math significantly. And utilities could begin to subsidize them, as they did with CFLs.