Calling all Metal Halide users

Discussion in 'Aquarium Lighting By Dana Riddle' started by Black Pearl, Dec 7, 2017 at 1:29 AM.

  1. Black Pearl

    Black Pearl Well-Known Member R2R Supporter Build Thread Contributor Partner Member 2018

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    How rare is this? I bought 3 Ushio 400w 14K bulbs to put in a Giesemann Spectra, only one bulb fit. The other two had wider and shallower threads couldn't even get them started. How is it that a manufacturer have different threads on their bulbs. I thought all MH bulbs would fit all MH lights. I mean this is crazy, isn't there some kind of industry standard?
     
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  2. A. grandis

    A. grandis Well-Known Member

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    Could you please put a picture showing both different threads.
    Where did you get the bulbs from?

    They have 2 different types of sockets for Ushio bulbs: E39 and E40.
    The E39 is the one we normally have in US.

    [​IMG]

    I would contact the place you got them from and explain your problem.

    Grandis.
     
    Last edited: Dec 7, 2017 at 3:26 AM
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  3. mcarroll

    mcarroll Well-Known Member R2R Supporter R2R Excellence Award

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    Not sure how to explain it within the same brand/model of bulb, but from my recollection...

    There are euro vs us standards sometimes.....E39 vs E40 on "medium base" halides, for example. One a 1 mm larger. The socket from the larger standard will accomodate the smaller, but not vis versa.
     
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  4. mcarroll

    mcarroll Well-Known Member R2R Supporter R2R Excellence Award

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    So any chance your sockets are mismatched?
     
  5. Black Pearl

    Black Pearl Well-Known Member R2R Supporter Build Thread Contributor Partner Member 2018

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    Sockets all good. Had Radiums in there, and the one Ushio that fit had threads very similar to the Radiums. I think the ones that I can't use are the larger mm. Is there any notation in the number that would indicate this
     
  6. Black Pearl

    Black Pearl Well-Known Member R2R Supporter Build Thread Contributor Partner Member 2018

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    IMG_1359.JPG
    The one on the bottom is the Radium,top is Ushio. The Ushio that fit looked more like the bottom
     
  7. A. grandis

    A. grandis Well-Known Member

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    Where did you get the Ushio bulbs from?
    Grandis.
     
  8. Black Pearl

    Black Pearl Well-Known Member R2R Supporter Build Thread Contributor Partner Member 2018

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    Premium Aquatics
     
  9. mcarroll

    mcarroll Well-Known Member R2R Supporter R2R Excellence Award

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    Sorry, that should have been "mogul base" not "medium" earlier.

    Could be you just have some defects – maybe try to exchange it with the retailer or call the maker or warranty support? Maybe even call Giesemann....Ushio's aren't exactle a no-name bulb.
     
  10. A. grandis

    A. grandis Well-Known Member

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    You need to call Premium Aquatics and tell them what's going on.
    I'm sure they will replace the bulb.
    Grandis.
     
  11. Black Pearl

    Black Pearl Well-Known Member R2R Supporter Build Thread Contributor Partner Member 2018

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    Oh yeah I've had great dealings with PA they are working with me, no issue at all there, just hope I don't keep running into this issue with other bulbs I might try, but for now I'm using the one Ushio and two Radiums and I'm loving the look. My pics are far better even with my Iphone just hope my coral growth improves
     
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