Before we had LEDs, there were compact fluorescent lamps, or CFLs for short. CFLs are fluorescent lamps that emit light from a mix of phosphors inside the bulb, and were designed to replace incandescent lamps (a lamp that produces light as a result of being heated). When compared to an incandescent bulb producing the same amount of light, CFLs use one-fifth to one-third the electric power, and last eight to fifteen times longer. Like all fluorescent lamps, CFLs contain toxic mercury, which complicates their disposal. In many countries, governments have established recycling schemes for CFLs and glass generally.
A light-emitting diode, or LED for short, is a lamp that emits light in a very narrow band of wavelengths. Because of this, LED’s are far more energy efficient than incandescent or fluorescent lights, which emit light in a much wider band of wavelengths. LED’s produce light that renders a color similar (but not identical) to natural daylight, which is measured on a scale called CRI, or Color Rendering Index. CRI’s range from 0-100, 100 being identical to natural daylight. Typical LED’s are around 70-95 CRI, but it is not recommended to put anything indoors below 75 CRI. Like incandescent lamps and unlike most fluorescent lamps, LEDs come to full brightness without need for a warm-up time.
So how much more efficient are LED’s?
On average, an incandescent bulb may last around 1000 hours, while a fluorescent (CFL) bulb producing the same amount of light (in Lumens) may last around 8,000 hours, and an equivalent LED bulb may last around 25,000 hours. Because of their efficiency, LED’s are generally more costly, but the energy saved on your electric bill pays off when compared to incandescent bulbs.
When looking at a 60-Watt incandescent bulb, the price of running that single bulb for 20 years (based on 6 hours per day) is $360. The price of running a 60-Watt LED equivalent for the same amount of time is only $72. So while an incandescent might only be around $1.00/bulb in comparison to $10.00/bulb for the LED, think about how much you would save by replacing every bulb in your house!up Etnies Shoe Lo White Women's Black Cut Lace BSIAaxqS
The 20-year savings on replacing a single candescent bulb with an LED would be $288, but when you multiply that by (as example) 20 light bulbs in your home, you’re saving $5760 in the long run. If you have even more, lets say (as example) 40 light bulbs in your home, you’re saving $11,520 over 20 years. That’s $576 dollars a year!
While these numbers are estimates, it is clear that LED’s are the most energy efficient option for light bulbs on the market, and the savings from switching out your old incandescent bulbs can keep some extra dough in your pocket.
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