Difference between regular hqi bulbs and hqi sps bulbs?

Discussion in 'Lighting, Filtration & Other Equipment' started by SalteeDogg, Apr 1, 2010.

  1. SalteeDogg

    SalteeDogg

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    Shopping for some new bulbs and noticed they sell sps hqi bulbs. I do plan on having alot of sps in the tank so been considering them. Was wondering what the difference in the bulbs are. I thought you could keep sps under regular hqi's. I have heard 20k sps bulbs look more like 15k.
     
    SalteeDogg, Apr 1, 2010
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  2. SalteeDogg

    daugherty part time reefer

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    the sps is the company name. sps does make good bulbs

    Select Ballast
     
    daugherty, Apr 1, 2010
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  3. SalteeDogg

    ccCapt Reef Hacker Moderator

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    What exactly do you mean by SPS bulbs? Are you talking about BlueLife South Pacific Sunlight brand bulbs or metal halide bulbs for growing SPS corals?

    HQI is a European standard for double ended (DE) bulbs. To fire true HQI bulbs, you need a pulse start magnetic HQI ballast. There are no single ended (SE) true HQI bulbs. The Blue Life SPS bulbs come in SE only and are not HQI. I was considering using the 250w Blue Life SPS 10k bulb because it has good PAR and a nice color.......but I was told by the "Lighting Guru" the bulbs are junk and lose their PAR and shift colors fast.
     
    ccCapt, Apr 1, 2010
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  4. SalteeDogg

    SalteeDogg

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    Actually there is a guy on my local forum that has 20k sps hqi bulbs. I didn't know sps was actually a brand, I thought when I heard people say sps bulbs that it was for sps corals :frustrat:...
     
    SalteeDogg, Apr 2, 2010
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  5. SalteeDogg

    SalteeDogg

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    SalteeDogg, Apr 2, 2010
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  6. SalteeDogg

    ccCapt Reef Hacker Moderator

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    I stand corrected. I was unaware they made DE bulbs, however they are not HQI. From the description on the page...."Unlike some other bulbs, SPS Metal Halide bulbs are manufactured with built-in igniters (starters) that allow them to be used with any type of ballast."
    True HQI bulbs must be fired with a magnetic pulse start ballast which overdrives them. An electronic ballast will fire them, but at a lower than recommended voltage so you don't get the intended color or PAR output. A magnetic probe start ballast will not fire them at all.

    Here are the only 250w Blue Life SPS bulbs that were tested.
    250w SDC performance
     
    ccCapt, Apr 2, 2010
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