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

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  •  does anyone else see the flicker when using LEDs? (2+ / 0-)
    Recommended by:
    My Spin, cai

    it drives me crazy, even tho I love the idea of them

    •  It's a known issue (3+ / 0-)
      Recommended by:
      My Spin, cai, Pandoras Box

      There's a lot of variation among LED designs. Energy Star ratings include a flicker reduction requirement. It's possible to find driver circuitry with minimal flicker:

      http://www.digikey.com/...

      •  That is an important link to the flicker problem (1+ / 0-)
        Recommended by:
        Pandoras Box

        That Link again:
        http://www.digikey.com/...

        The effect of flicker
        According to studies about 1 in 4,000 people are highly susceptible to flashing lights cycling in the 3 to 70 Hz range. Such obvious flickering can trigger ailments as serious as epileptic seizures. Less well known is the fact that long-term exposure to higher frequency (unintentional) flickering (in the 70 to 160 Hz range) can also cause malaise, headaches, and visual impairment.
        Although the flicker may be imperceptible, it could still be a problem. For example, workers in offices illuminated by flickering fluorescent tubes have been quick to point to “sick building syndrome” as a reason for higher-than-average absence rates. There is no direct evidence that flicker causes the malaise, but recent research suggests there is a good chance it is one of the causes.
        I was wondering why there is a buzzing problem reported in some reviews.  I could only guess that the circuit boards were improperly mounted and the problem can be remedied for that and that there is not some other mechanism for the buzzing.
        •  I have also been sensitive to fluorescent (0+ / 0-)

          lights - when I worked in an office I had them take out the bulbs which were directly overhead and I used a lot of side lighting

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