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View Diary: Something to watch with LED lighting (233 comments)

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  •  thanks for the alert, we'll be on the watch (2+ / 0-)
    Recommended by:
    badger, mrkvica

    Very interesting info. We knew nothing about the LEDs except that they didn't have the mercury. Thanks

    •  but they have lead and arsenic (2+ / 0-)
      Recommended by:
      badger, Another Grizzle

      at least according to this study       

      http://www.scientificamerican.com/...

      It's the Supreme Court, stupid!

      by Radiowalla on Tue Jan 14, 2014 at 06:09:36 PM PST

      [ Parent ]

      •  So do PC's... n/t (2+ / 0-)
        Recommended by:
        badger, kyril

        Float like a manhole cover, sting like a sash weight! Clean Coal Is A Clinker!

        by JeffW on Tue Jan 14, 2014 at 06:18:49 PM PST

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      •  The study is from 2010 and has problems (6+ / 0-)

        The source of the SciAm article is here:
        http://pubs.acs.org/...

        The critique can be found here:
        http://www.ledsmagazine.com/...

        A recently-published journal paper suggests that many LEDs should be classified as hazardous waste, but the sample size is very small and some of the conclusions drawn could easily be described as scaremongering.
        [...]
        Look closer at the journal paper and you’ll see only one LED (low-intensity red) had Pb content that was vastly in excess of the relevant limits, while all the other LEDs had miniscule Pb content. This result points to a high-Pb-content solder in the low-intensity red LED. Maybe the LED industry should shift to using Pb-free solders? Perhaps more than one low-intensity red LED should have been tested?

        We’re not trying to trivialize the importance of reducing or eliminating any possible hazardous risks from LED lighting, throughout the entire lifecycle. We understand the need to study whether hazardous materials could leach into groundwater if LEDs end up in landfill. But surely it’s not appropriate to recommend that a broken Christmas LED light has to be cleaned up using gloves, a mask and a special broom?

        emphasis mine

        I'm a Vietnam Era vet. I'm also an Erma Bombeck Era vet. When cussing me out and calling me names please indicate which vet you would like to respond to your world changing thoughts.

        by Just Bob on Tue Jan 14, 2014 at 08:53:47 PM PST

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        •  That's outdated (7+ / 0-)

          Outside of the military and a few applications of very large fixed equipment, nobody uses lead-based solder any more for any purpose, and electronic components for any purpose with the same exceptions above don't contain lead per EU Reduction of Hazardous Substances (RoHS) regulations, which have been adopted by manufacturers (if not governments) globally.

          It's unlikely something manufactured around 2010 still contained lead - don't remember the exact implementation date, but it's earlier than that IIRC. LEDs have never needed lead except to make the leads (pronounced "leeds", the wires connecting to them) solderable. It's not related to anything operational.

          Arsenic, which can be found in many kinds of semiconductors and many LEDs, is tightly bound in a chemical compound or crystal lattice (the latter at very low concentration) and further encapsulated in clear plastic or Epoxy B, and is unlikely to leach into the environment AFAIK.

          No matter how cynical you become, it's never enough to keep up - Lily Tomlin

          by badger on Tue Jan 14, 2014 at 09:28:38 PM PST

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    •  Do LEDS Put Out (0+ / 0-)

      Ultra violet rays?  UVA and/or UVB?   I'm massively photosensitive (Lupus side effect) and don't want to wear sunscreen relaxing at home.

      -approaching Curmudgeonry with pleasure

      by Calfacon on Wed Jan 15, 2014 at 08:40:59 PM PST

      [ Parent ]

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