As a kid, I was inspired by the decorative lighting in my grandparents' finished basement. They had festooned the place with multicolored C9 string lights (aka old-school Christmas lights) from wall to wall, beneath the built-in wet bar, around hanging mirrors, and anywhere else they could add an ambient accent for the parties they hosted down there year-round.
Since then, I've festooned every home I've lived in with decorative lighting, whether in a sequestered man cave or throughout my apartment. In short, I've spent an embarrassing amount of money on lighting up my abode like a carnival attraction. So it was good news for me when manufacturers introduced a more cost-effective, environmentally sound lighting option: the LED (light emitting diode).
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A rudimentary form of LED tech surfaced as far back as the late s, but its illumination was weak and limited to one end of the spectrum (the red end). Once LED lighting became popular for consumer use in the early s, its evolution toward brighter bulbs and higher efficiency was relatively swift.
Today, LED bulbs are replacing other types of bulbs for every application, from plant-growing arrays to decorative rope lights to arrestingly bright floodlights. LED is the new standard for both practical and ambient lighting, and we're much better off for it -- for several reasons.
For one thing, LED bulbs are way more efficient than older types of lighting technology. The Second Law of Thermodynamics dictates that every mechanism (natural or man-made) that transfers energy is subject to some degree of waste. Incandescent lightbulbs, for example, are pitifully inefficient. As little as 10% of the electricity they consume is converted into visible light. The remaining 90% is lost as heat. That's not the case with LEDs.
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The semiconductors in LED bulbs can convert up to 95% of electricity into light, making them 8 to 9 times more efficient than incandescent bulbs. Even if money weren't an issue, that's an impressive engineering upgrade in terms of conserving resources. LEDs have integrated heat sinks that absorb heat while the source is lit. This is why LED bulbs and fixtures never feel hot to the touch.
As recent as the last decade, the majority of bulbs in household lamps were incandescent. Research shows that incandescent bulbs are steadily phasing out, both in homes and on the shelves of your local Home Depot. Here are a few reasons why:
Keep in mind that the figures above are averages, and performance will vary from brand to brand and material quality. These numbers and ratios are similar when comparing LEDs to halogen bulbs, although the difference between the two is more dramatic because halogen generates so much heat.
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While fluorescent (CFL) bulbs run much cooler than incandescent or halogen bulbs, LEDs are still 1.5 times more efficient than a fluorescent bulb that produces the same amount of light. CFLs are used primarily to illuminate workshop areas like garages or office rooms, and they lack the dynamic qualities of LEDs, which can be crafted into myriad form factors.
Finally, on the macro scale (worldwide), LED lighting could save over 569 TWh (terawatt-hours) of energy annually by , equal to the annual energy output of more than ninety-two 1,000 megawatt power plants.
LED lighting is more than efficient and cost-effective. Its list of benefits runs deep compared with conventional lighting.
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