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Replacing light bulbs

Discussion in 'Electrics UK' started by tellytv, 28 Jan 2019.

  1. tellytv

    tellytv

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    Was wondering if anyone could help

    I need to replace some light bulbs which states on the fixture

    "replace with 11w GU10 energy saving bulb"

    would it be ok if i just used the GU10 50w that aren't energy saving?

    Thanks
     
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  3. EFLImpudence

    EFLImpudence

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    Obviously not.

    The "energy saving" just means the 11W ones use less 'energy' than ones with a higher wattage.
     
  4. JohnD

    JohnD

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    GU10 50W is perhaps a halogen lamp, that will run very much hotter than a 11W LED and probably cause embrittlement, charring and cracking of the lampholder. In many, but not all cases, it will not cause your house to burn down.
     
  5. fluorescence

    fluorescence

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    You can buy LED GU10 lamps for as little as £1 that consume 1/10th the electricity of a 50w halogen. Why on earth would you want to use a halogen?
     
  6. bernardgreen

    bernardgreen

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    To get full colour spectrum light

    This comparison of spectrums explains why "white" LED light cannot give the same appearance as "white" light from an incandescent light source.

    [​IMG]



    Image copied from HERE
     
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  8. fluorescence

    fluorescence

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    Many thanks, I am fully aware of that. I was actually thinking as I wrote it that the only reason would be due to the near 100 cri of halogen. In this instance however, I very much doubt that colour rendering will be an issue and this will just be a typical domestic environment (could be wrong of course!) :)

    Also FYI your graph is comparing incandescent to cool white LED's. A little bit unfair IMHO, warm white would typically have more in the red spectrum and less blue, but still wouldn't a very full spectrum admittedly!
     
  9. bernardgreen

    bernardgreen

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    The "blue" peak at 375nM is the UV created by the LED element. The other colours are produced by phosphors acticated by the UV

    The ultraviolet (UV) spectrum is generally accepted to be from 10 nM to 400 nM,

    Visible light is generally accepted to be from 380nM to 740nM
     
  10. ban-all-sheds

    ban-all-sheds

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    upload_2019-1-31_18-21-40.png
     
  11. DetlefSchmitz

    DetlefSchmitz

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  12. bernardgreen

    bernardgreen

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  13. DIYnot Local

    DIYnot Local

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