MH not igniting

Discussion in 'Lighting' started by HenkHugo, 2 Nov 2007.

  1. HenkHugo

    HenkHugo

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    Hey guys,

    i replaced my MH globes a few days ago and they have been working perfectly till this morning. when the timer switched the lights on only the one ignited. You can see there is a current passing thru the light but its not actually "taking".

    would this be the globe or the ballast?
     
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  3. Shaun

    Shaun Retired Moderator

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    Try turning them around top to bottom, may be some thing to do with the murcury setteling in wrong place.
     
  4. Mekaeel

    Mekaeel Moderator MASA Contributor

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    im sure its the bulb.have you tried another one?
     
  5. HenkHugo

    HenkHugo Thread Starter

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    righteo - replaced the globe - works fine. theres some serious burn marks on the one i took out. so i guess i am back to using the R150 osram NDA globes :p

    yes this is for a freshwater tank :thumbup:
     
  6. jacquesb

    jacquesb Retired Moderator

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    Hi Henk, what's the 150watt Osram NDA globes? I had a discussion with Alan a short while ago - even for Marines, one could the "standard" 150watt DE globes from Builders Warehouse, as long as they are between 5500K and 6500K.... One should then just add enough actinics to cancel out the "p-yellow" look.....

    In any case - I had my one MH globe "blow" on me too - did EXACTLY the same as you described..... So I ended up having to replace it....
     
  7. HenkHugo

    HenkHugo Thread Starter

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    Natural Day Light - it should read NDL :p

    i get them from Eagle in town... cheap cheap!
     
  8. jacquesb

    jacquesb Retired Moderator

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    Cool! Thanks - what Kelvin rating are they, Henk?
     
  9. Mekaeel

    Mekaeel Moderator MASA Contributor

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    hows the growth of your corlas with the low K rating Henk?
     
  10. jacquesb

    jacquesb Retired Moderator

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    Mekaeel - Henk has a Fresh-water system now. BUT, as per my discussion with Alan about the 6500K Metal Halides - the coral growth should be MUCH MUCH MUCH better, because the PAR rating is theoretically at optimum level between 5500K and 6500K.... (this higher the Kelvin rating, the lower the PAR I believe)....
     
  11. Mekaeel

    Mekaeel Moderator MASA Contributor

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    sorry was speed reading.i agree Jacques,the growth will be excellent with the low K rating ie.6500k
     
  12. viper357

    viper357 Admin MASA Contributor

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    Are you lost? :whistling:
     
  13. HenkHugo

    HenkHugo Thread Starter

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    Nope dean i'm not - a MH is a MH :p doesnt matter what you use it for. They are rated at 6700K
     
  14. viper357

    viper357 Admin MASA Contributor

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    lol, just yanking your chain ;)
     
  15. Rory

    Rory Admin MASA Contributor

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    Lucky Henk... :p
     
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