Inside the New LED Retrofit Bulbs

　　第一批60瓦白熾燈泡的LED替代品現在出現在美國各地的商店貨架上。雖然目前美國法律將淘汰100瓦白熾燈泡的2012，就可以很容易地找到其他–15， 25， 40瓦白熾燈泡的替代品，60，和75。LED燈泡的初始成本比較高，但隨著時間的延長和節能，它們的價格比自己還高。

　　LED燈泡已經收到了最多的關注，到目前為止是12e26a60 AmbientLED模型，12.5 W，800 W白熾燈泡更換為60流明的飛利浦照明（圖1）。它與美國能源部首個光明明天照明比賽獲得的燈泡相似，也就是L獎。它還宣稱在CFL和LED燈泡的佼佼者在消費者報告雜志進行了燈、吸頂燈試驗。

　　Figure 1： Philips Lighting’s 800-lm， 12.5-W AmbientLED （left） is a replacement for 60 W incandescent bulbs. The LED bulb is similar to the Philips bulb （center） that won the first Bright Tomorrow Lighting， or L Prize， competition from the U.S. Department of Energy， but the latter has four lighting segments while the former has three. In 2012， Philips’ will begin selling the bulb at left， which includes features from both the current and L Prize bulbs. （Courtesy of Philips Lighting）。

　　At first glance， these yellow-orange-colored bulbs do not look like they would produce the 2，700 K warm-white light we’ve come to expect from a typical household incandescent bulb. That’s because the LED bulb’s outer plastic surface has a remote-phosphor coating on its inside， which is actually key to its performance. The phosphor efficiently converts the light of high-efficacy blue LEDs into warm-white light while simultaneously making the lighting even across the surface.