Will White LEDs Dethrone the Incandescent Bulb?
Kirt's Cogitations™ #131

RF Cafe University "Factoids," "Kirt's Cogitations," and "Tech Topics Smorgasbord" are all manifestations of my ranting on various subjects relevant (usually) to the overall RF Cafe theme. All may be accessed on these pages:

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Will White LEDs Dethrone the Incandescent Bulb?

White LEDs are now available, thanks to progress in Gallium Nitride (GaN) and Indium GaN (InGaN). One versions combines a blue LED with a yellow phosphor to generate white light (slightly yellowish). Another uses a UV LED to excite red, blue and green phosphor (ala a fluorescent lamp) to get white light. Efficiencies of 20 lumens/watt have been demonstrated - which is better than an incandescent bulb. Someday in the not-too-distant future you will likely see them in Wal-Mart where the 100-year-old-technology bulbs sit today.

Werbel Microwave power dividers, couplers - RF Cafe Website

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a lady's voice announced "You've Got Mail" when a new message arrived...