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Discuss 12v 50w downlights that keep blowing in the Electrical Wiring, Theories and Regulations area at ElectrciansForums.co.uk.

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  1. supasparxs
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    supasparxs Electrician's Arms

    Location:
    Leigh, Lancashire
    The Opps manager of a regular repeat customer of mine has some issues with the 12v 50w down-lighters in his kitchen and bathroom

    each light is supplied by it's own 12v 50w transformer, but the same 4 (out of 8) lamps in the kitchen and same 2 (out of 4) lamps in the bathroom keep blowing.

    the replacement lamps were bought at different times by different shops, so it isn't a bad batch of lamps.
    anyone have any ideas?
     
  2. needasparks
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    needasparks Electrician's Arms

    Location:
    Essex
    Are you sure its the lamps blowing (tested them) it could be a loose conection that makes again when they are moved when touched, over heating with insulation possibly. How long are they lasting ? are they going out together ?
     
  3. Dcf
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    Dcf Trusted Advisor

    Check the pins on the lamp. If one is pretty black the lamp holder is faulty.the lv lamp holder was the weak link in the system as they have roughly 4A running through them. U see to get lamp holders with screws which used to be much better.
     
  4. supasparxs
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    supasparxs Electrician's Arms

    Location:
    Leigh, Lancashire
    Thanks guys.
    good thinking
     
  5. needasparks
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    needasparks Electrician's Arms

    Location:
    Essex
    Probs like this you have to take a step back, roll a fag and drink tea. Only then the answer comes.
     
    • Like Like x 5
  6. supasparxs
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    supasparxs Electrician's Arms

    Location:
    Leigh, Lancashire
    I gave up smoking 3 years ago,
    I gave him a costing to change all the lights to GU10 LED down-lighters
     
    • Like Like x 2
  7. billmicheals
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    billmicheals EF Member

    gu 10 led down lighter in a bathroom any where near a bath or shower ?
     
  8. supasparxs
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    supasparxs Electrician's Arms

    Location:
    Leigh, Lancashire
    Yes one is directly above the shower,
    (the existing and the replacements were and are the IP rated version for use in bathrooms)
     
  9. leonard290
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    leonard290 Guest

    get rid of dichroic lamps get to hot and waste of energy.replace lamp not fitting with 4.5watt led,suggest warm white.about £9.00 each.50000hrs 4 year gaurantee
     
  10. Dunc
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    Dunc Guest

    Recessed (ceiling) lights are classed as being outside of the zones altogether.
     
  11. gbert
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    gbert Guest

    Most gu10 led downlighters are directional ie they give a beam, not a spread of light i would go with warm white CFL lamps 7 to 13 w
     
  12. lauriehurman
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    lauriehurman Guest

    LEDs;
    I've tried "daylight" they are very efficient in Lumens/watt but they were just too "blue" in a white bathroom.
    I tried "warmwhite" - they were too yellow for the bathroom, would look good in a living room.
    I'm now on "neutral white" - they seem best.

    Halogens;
    "dichroic" lamps only reflect part of the spectrum downwards. They make the fitting run very hot indeed. I've replaced die-cast Al fittings which were completely distorted. Aluminium reflector Halogen lamp reflect the whole spectrum and make the fitting and the lamp run cooler and may stop the lamp giving up so frequently.

    CFL;
    Take time to warm up and produce sufficient light. Fine in a living room but you don't want to walk into the bathroom to have a **** and then have to wait for the lights to warm up :)

    IP65 fittings are great, very safe, but they do let less of the light downwards and trap more of the heat.
    Whatever you choose don't forget your fire hoods.

    Laurie
     
    • Like Like x 1
    Last edited by a moderator: Feb 25, 2012
  13. lauriehurman
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    lauriehurman Guest

    MY big worry is that the latest downlight fitting do not have a glass between the lamp and the room, and when you then fit an LED you have a gap between the lamp and the fitting. Not even IP4X.

    I'm sure you are more experienced than I am so your thoughts on this are welcome.
    Laurie
     
  14. supasparxs
    Offline

    supasparxs Electrician's Arms

    Location:
    Leigh, Lancashire
    The original light had a IP4X light directly over the shower and the other three normal fittings. I felt that they were yo close to the shower so I upgraded all four fittings to IP4X fittings.
     
  15. lauriehurman
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    lauriehurman Guest

    You mean IPX4 but we all know you meant that :)
     
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