14000K BLV - MH's

Discussion in 'Lighting' started by Marlin Fischer, 13 May 2010.

  1. Marlin Fischer

    Marlin Fischer Mutantfish

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    Hi everyone

    Need some advice on MH lighting.

    I have had my MH's running on my new tank now for 5 months however the 14000K BLV bulbs I am using are still a little too yellow for my liking.

    I noticed that many TOTM or TOTY have an awesome blue hue to them in photos and i prefer this to the current yellowness I am experiencing with my BLV's. I have T5's running as well at the moment and almost all are blue however they don't really add enough blue to the visuals.

    What would the effect on my corals be if I used an even higher Kalvin bulb like a 20'000K BLV 250W metal halide bulb instead? I have mostly LPS and softies as well a 2 bubble tip anemones and a few SPS. Anyone used these bulbs before?

    The metal halide bulbs just seem to be a lot less blue than the t5's with the same kalvin rating.

    At present I run 2 x 250W BLV 14000K Metal Halides and 8 x 54watt T5's on my 2m tank.

    The tank is listed as Fischer's Peninsula under Supersized Tanks.

    thanks...
     
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  3. Manic

    Manic Moderator

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    I'm using the 20 000K BLV 250W MH and it is sort of blue but more white.
     
  4. Manic

    Manic Moderator

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    Another thing I have found is that the BLV globes need an electronic ballast to work properly. I just checked mine now and I can look at the bulb where as my 150W MH I cant even nearly look at the globe. I really think I need to get an electronic ballast...
     
  5. Tobes

    Tobes Retired Moderator

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    BLV globes are generaly less blue than other MH globes of the same kelvin rating. I have a 20000k 250w BLV globe and it gives a nice colour not too blue and not too white. Coral growth will slow down a bit with a higher kelvin rating but the advantage is that algae likes lower kelvin ratings, so less in their favour :)
    LPS corals will be fine under the 20000k as they are a bit deeper in the ocean. Not too sure about SPS as I'm not into sticks :whistling:
     
  6. Marlin Fischer

    Marlin Fischer Thread Starter Mutantfish

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    Ya? The 14000K seems like a 10000K and i can imagine that the 20000K would still not be very blue? How are your corals doing? You experience any adversities with those bulbs?

    Do you use any T5's as well?

    BTW ...dig purple tangs as well!
     
  7. Marlin Fischer

    Marlin Fischer Thread Starter Mutantfish

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    Yep algae loves my bulbs... the only thing saving my tank is the UV sterilizer and Phosphate reactor!

    So thats cool if your tanks are working ok with those bulbs! Have to change... the yellowish tinge takes all the beauty out of most of my corals!

    What did you guys pay for your bulbs and where you get yours? I found some at Lamphouse in CPT for R600 each. Is that a good price?
     
  8. Tobes

    Tobes Retired Moderator

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    here's a pic of my 20000K BLV 250w


    [​IMG]


    [​IMG]
     
  9. Tobes

    Tobes Retired Moderator

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    No T5's and no corals yet, tank is still cycling ;)
     
  10. Marlin Fischer

    Marlin Fischer Thread Starter Mutantfish

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    JEEEES!!!

    Thats a massive improvement on my bulbs!!!!!

    Awesome setup, what light unit is that?

    Thanks for the pic.... definitely gonna make a change if the corals are happy with it a few months down the line!
     
  11. Marlin Fischer

    Marlin Fischer Thread Starter Mutantfish

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    Also ... like that the tank is viewable from both sides! Peninsula style.;)
     
  12. Tobes

    Tobes Retired Moderator

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    Aquamedic - the aquastarlight future
     
  13. Marlin Fischer

    Marlin Fischer Thread Starter Mutantfish

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    Nice!!

    Thanks for the info!
     
  14. Manic

    Manic Moderator

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    That looks very blue, I think your white balance on the camera was a bit off. Mine is more white, here's a pic:

    [​IMG]

    Just thought I would show you before you are disappointed again.
     
  15. ziyaadb

    ziyaadb

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    2ok BLVs look awesome. if u want more blue get some 20K T5s to supplement but u wont regret it. I saw ADEES and his looked fantastic
     
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