2011年3月27日 星期日

LED lighting not yet practical for many uses.

Energy adviser: LED lighting not yet practical for many uses.

With a countdown under way to eliminate incandescent light bulbs from store shelves by Jan.It would repeal a portion of the 2007 Energy Independence and leather phone cases Security Act that phases out traditional incandescent light bulbs for more energy-efficient ones over the next several years. Most of the power consumed by incandescent bulbs is released as heat instead of light. 1, what should consumers know about LED lighting as an alternative in the home?

The Energy Independence and Security Act of 2007 set in motion a transition mandating that all light bulbs use 30 percent less energy than current incandescent bulbs by 2014.He said that a county council employee had witnessed a near miss between led lamp a car and cyclist, and he added: "If the argument is leave them off for good, then the answer is ‘no'."

As part of the change — between Jan. 1, 2012, and Jan. 1, 2014 — all conventional incandescent light bulbs with ratings between 40 watts and 100 watts will be gone from the U.S. market. The change does not mean that consumers can’t use incandescent bulbs, just that retailers can’t sell them.

Replacement options from manufacturers come in the form of compact florescent lamps, called CFLs, and light-emitting diodes, called LEDs. This column focuses on LED technology.

An LED is a semiconductor light source that releases energy in the form of photons across a luminescent spectrum. According to industry experts, LEDs offer advantages over incandescent light sources because of their lower energy consumption, longer lifetime, improved robustness, smaller size,To charge the battery, just plug the built-in USB dsttマジコン cable to an open USB port on a computer or USB AC adapter. The cable is only 4-inches long so a USB extension cable may be needed. faster switching, and greater durability and reliability. However, LEDs powerful enough for room lighting are relatively expensive and require more precise current and heat management than compact fluorescent lamp sources of comparable output.In the other open position, the outdoor christmas decorations dock holds the iPhone in a perfect position for resting on a tabletop for most any use including FaceTime.

The advantages of LED lights are that, in addition to their higher energy efficiency, they have a longer life, are rugged and do not contain mercury.

Their disadvantages? More expensive than incandescent bulbs or CFLs and their light output is limited to lower-light-level applications.

According to a report by Portland General Electric, “Because LEDs cast light in one direction at a narrow angle, they are not yet practical or cost effective for general illuminatSome incandescent bulbs, including large pet carrier aquarium lights and specialty bulbs for appliances, aren't affected by the law.ion.” In addition, their heat sensitivity can hurt performance and longevity.

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