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  1. #1
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    WH7 How Many Bulbs?

    I get frustrated trying to read specs and wiring diagrams on manufacturers webistes. But I'm sure many of you here know the answer to this question:

    How many 36" bulbs will one workhorse7 ballast fire?

    TIA!
    35Gal mixed Reef with light fish load. 250W MH, Jebo Skimmer,

    100Gal FOWLR- Heavy fish load and a few soft corals.

  2. #2
    Member the_borg05's Avatar
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    I would need the specs on the ballast and the bulbs wattage to calculate it for you
    PERMISSION : Somthing you need if you want to do it again, not required if you only want to do it once...

  3. #3
    ijo
    ijo is offline
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    It depends on the type of lamp your looking to fire... I'm almost sure a WH7 ballast can fire NO, HO, VHO, PC and T5's.

    IJO

  4. #4
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    Sorry..guess I type faster than I think...I meant to mention that I want to use 36" VHO.
    35Gal mixed Reef with light fish load. 250W MH, Jebo Skimmer,

    100Gal FOWLR- Heavy fish load and a few soft corals.

  5. #5
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    36" VHO are 95W. The WH7 is rated for 220W. That would mean it could fire two 36" bulbs.
    Nick

  6. #6
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    Thanks Nick....now I can plan my retro...actually I don't really plan, I just sort of fly by the seat of my pants! But at least now I know how many ballasts I need.
    35Gal mixed Reef with light fish load. 250W MH, Jebo Skimmer,

    100Gal FOWLR- Heavy fish load and a few soft corals.

  7. #7
    Senior Member Conan's Avatar
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    so a search on AC for WorkHorse 7.... one guy's endcaps caught on fire with a similar set up.... forget who it was!
    Do or do not. There is no "try" - Jedi Master Yoda

  8. #8
    Senior Member Conan's Avatar
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    Do or do not. There is no "try" - Jedi Master Yoda

  9. #9
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    Thanks Conan...food for thought...back to the drawing board!
    35Gal mixed Reef with light fish load. 250W MH, Jebo Skimmer,

    100Gal FOWLR- Heavy fish load and a few soft corals.

  10. #10
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    Don't forget that that thread is about one person's (tragic) experience while there are many people who use WH7 combos with no problems at all. Also, by memory, I think there was a design flaw in the way the end caps were mounted which contributed to the fire.

    I've had no poblems running 150W off a WH7 (everything was very cool to the touch). I recently added a third tube (225W) and things have got hotter but not hot enough to worry about.

    You certainly need to be careful in wiring these things. I wired up a cord to my ballast with a plug in the middle to act as a disconnect so I could easily remove the hood. Without thinking, I put the male end of the plug on the cord running to the wall. First time I disconnected, my fingers touched the male ends and I got a full 120V shock. No serious damage but a rather nasty burn on my figners. Could have been much worse.
    Nick

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