New Light

Incandescent bulbs offer warm, but inefficient, illumination. Fluorescent lights save energy and last longer but cast a greenish glow. With the help of researchers at Brown University, engineers at Sandia National Laboratories in Albuquerque, NM, have come up with a brighter idea. They’ve developed a tiny solid-state laser that promises to deliver a longer-lasting white light while using minimal electricity. Related to the LEDs that blink in electronic appliances, the device emits ultraviolet light, which strikes a phosphor coating; the phosphor glows with an eye-pleasing white light. Lightbulbs made from the chips could last up to 10 times longer than fluorescent bulbs and up to 50 times longer than incandescent ones. The invention, only 20 micrometers square, requires the help of large conventional lasers; an electrically powered prototype should be ready within two years, with commercial models due in five to 10 years.

Uh oh–you've read all of your free articles for this month.

Insider Premium
$179.95/yr US PRICE

Want more award-winning journalism? Subscribe to Insider Basic.
  • Insider Basic {! insider.prices.basic !}*

    {! insider.display.menuOptionsLabel !}

    Six issues of our award winning magazine and daily delivery of The Download, our newsletter of what’s important in technology and innovation.

    See details+

    What's Included

    Bimonthly magazine delivery and unlimited 24/7 access to MIT Technology Review’s website

    The Download: our daily newsletter of what's important in technology and innovation

/
You've read all of your free articles this month. This is your last free article this month. You've read of free articles this month. or  for unlimited online access.