Bright Future

Using LEDs for general lighting may finally be a bright idea.

In the past few years, light-emitting diodes have made huge advances in energy efficiency. Industry sources and outside experts say LEDs are now the most energy-efficient lighting source available. They use far less energy than other bulbs, last a lot longer, and cost less to use over their lifetime.

However, the LEDs use about 85% less energy and last 30 times longer. They also use about half as much energy and last five times longer than compact fluorescent lights…..

…..Sticker Shock

For now, price remains the biggest obstacle, especially for residential use. But there are signs that this is changing as well. Consider “down lights,” the kind of directional, recessed lighting that is common in many homes and offices. LEDs are well-suited for this kind of lighting because they typically provide directional light (although some LED lamps have added lenses to give more diffuse light). But despite their suitability for this purpose, Sloan Ritchie, a sustainable-home builder in Seattle, says he isn’t yet installing LED down lights because they’re too expensive: about $80 each, compared with $15 for an incandescent and $35 for a fluorescent. Even though LEDs offer savings in the long run — and use less energy — consumers still are reluctant to pay more up front. However, with LED prices falling about 25% a year, Mr. Ritchie says he may begin using them next year.

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