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View Diary: The rise of LED light bulbs (218 comments)

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  •  I suspect that that purity of color (6+ / 0-)

    is part of what makes LEDs less attractive to some people (and more attractive to others.) Similarly, the fact that all LEDs of the same color are really the same color -- none of the tiny variations in spectrum or brightness that you get with incandescent bulbs -- may be a negative or a positive, depending on who's beholding them.

    I think my eyes prefer the aesthetics of the incandescent bulbs, but the energy savings of the LEDs makes them more pleasing to my brain.

    Let us all have the strength to see the humanity in our enemies, and the courage to let them see the humanity in ourselves.

    by Nowhere Man on Fri Dec 21, 2012 at 08:50:12 PM PST

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    •  Except for "white" LEDs (7+ / 0-)

      Most "white" LEDs are really blue LEDs (amazingly bright and efficient nowadays) plus some yellow phosphor that's excited by the blue light.  In theory, the blue and yellow mix in your eyes to produce something that looks white.  In practice, it's really hard to get the blue and yellow balanced properly, which is why you see a blue tinge on "white" LEDs.  The other problem is that the balance gets out of whack as the LED ages.  This is not well understood, since LEDs have been used as indicators though most of their existence rather than for lighting.  The higher power needed for lighting makes them deteriorate faster.

      There are true "all color" LEDs which have red, green, and blue LEDs in the same package.  However, they're more expensive and it's hard to get the currents balanced so that you get true white.

      Isn't this fun?

      Better to hide your tax returns and be thought a crook than to release them and remove all doubt. [Adapted from Abraham Lincoln]

      by Caelian on Fri Dec 21, 2012 at 10:30:00 PM PST

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