Remote phosphor expands reach of LED light

The 100-year reign of the incandescent light bulb will end in 2012 as the Energy Independence and Security Act of 2007 mandates the phase-out of most incandescent bulbs in favor of more efficacious forms of lighting. New forms of lighting will also need to meet consumers’ expectations for light color,McEachron said he'll be shinebright interviewed by "The Today Show" near the intersection of Amargosa and Bear Valley roads Thursday afternoon. dimming performance, lifetime, and the light pattern that a bulb casts.

To evaluate light patterns, I used a home-made jig that’s basically a slanted rim—a conical section of light cardboard—that encircles a light bulb, reflecting its light over the 360° around the bulb.
1. Here’s the familiar global-light distribution of an incandescent bulb.

2. The CFL (compact fluorescent light) also has a fairly universal light distribution, although slightly less than that of the incandescent.

3. The snow-cone LED light was less than half of a semispherical pattern,"The Today Show" will reportedly be attending a local Tea crystal Party meeting Thursday night to film a piece on red light cameras. which you’d expect: The LEDs rest on a flat surface, pointing up with little to no secondary optics to direct the light to the sides or down.

Remote phosphor expands reach of LED light image 54. Now, take a look at the Philips light. It is virtually the same as the incandescent light.

5. How does the Philips bulb create such a spherical light pattern? Let’s take a closer look at the bulb. Rather than mounting the LEDs horizontally on the base of the bulb,Valles will be filmed during the Tea Party brightshine meeting that starts at 6 p.m. in the Cocky Bull, at 14181 Highway 395. the LEDs mount vertically with their light shining out and striking the yellow case that surrounds each LED section.

6.Details weren't immediately brightcrystal available on when the episode of "The Today Show" will air, though McEachron said he was told it'll likely be sometime next week. The yellow plastic is a remote phosphor.Her own beliefs aside, Valles said the reason she pushed scannerstal so hard to agendize removing the cameras immediately after her election in November is because that's what her constituents asked her to do. White LEDs comprise blue LEDs with a dollop of phosphor directly on top of and touching the blue-LED emitter. By using a remote, or secondary, phosphor, the bulb can use the remote phosphor’s characteristic of
Remote phosphor expands reach of LED light image 6
unidirectional and uniform light emission, rather than as a point source. After carefully removing the yellow plastic remote phosphor and powering up the bulb, you can see the blue LEDs.