Edison, Make Way for the L.E.D.s

In case you didn’t know it, Thomas Edison’s invention, in use for more than 100 years to illuminate virtually everything, is quickly heading for the exits. What will eventually take its place is the light-emitting diode (L.E.D.) bulb, made up of tiny light sources the size of a head of a pin that use a fraction of a regular light bulb’s electricity, produce little heat, and last for tens of thousands of hours of use.
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L.E.D.’s are not widely used today because of their high cost: An L.E.D. bulb can run as high as $90. Even if they would save money in the long run, few people are willing to spend that much up front.

But costs will come down, and when they do, expect to see the end of what is in essence an interim technology: the compact fluorescent bulb. Fluorescents, while using much less power than incandescent light bulbs, are sometimes too bulky, often can’t be dimmed and produce light that is less pleasing than incandescents.

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