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Thread: T8 vs. T12

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    Veronis's Avatar
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    T8 vs. T12

    For a 48" fluorescent shop fixture, I'm curious - in your experiences, which is better for carnivorous plants (specifically, VFT's and warm (low 80's) humid terrarium species) - T8 or T12?

    I understand a few basic differences between the two, but I don't know if it actually matters which you use.

    If both are about the same light quality, but T8's run cooler than T12's, please let me know, because as of now the T12's I have are slightly overheating my terrarium.

    Anyone?

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    Moderator Joseph Clemens's Avatar
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    I've tried both, I prefer the T-12, simply because the lamps and their ballast are more economical (they're both cheaper) that the T-8's.
    Joseph Clemens
    Tucson, Arizona, U S A

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    Veronis's Avatar
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    Quote Originally Posted by Joseph Clemens View Post
    I've tried both, I prefer the T-12, simply because the lamps and their ballast are more economical (they're both cheaper) that the T-8's.
    For my small setup, I'd be willing to spend the extra if T8's are just as 'good' but run a bit cooler. My T12's run fairly hot, and the fixtures were only $9 at Lowe's, so I'm pretty well certain they're using magnetic ballasts vs. electronic.

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    The lights of america fixtures you can get at walmart for $9 will run both T8 and T12. I've never tried T8, but I don't see any benefit. I grow lowland neps only, so I like the heat, and T8s produce less lumens, but cost the same amount. Pointless IMO.
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    Cardiac Nurse JB_OrchidGuy's Avatar
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    T8's produce less light? Interesting. ok That is good to know. But if you move up to T-5's you get more light (lumens) right?
    JB
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    billylh's Avatar
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    found this on the internet.

    Bulb for bulb, T8s give the same amount of light, or possibly slightly more, as equivalent T12s. According to the "Philips Lighting Guide to Fluorescent Lamps" for comparable 48" lamps, a T8 produces 2600 "design lumens" versus a T12's 2520 "design lumens". However, the T8 does this using 32 watts versus the T12's 40 watts. So while a one-for-one replacement of T12s with T8s
    won't necessarily increase your lighting it will lower your electricity bill.
    ~b

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    Cardiac Nurse JB_OrchidGuy's Avatar
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    Thanks for the info.
    JB
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    --Freedom Czar-- Fryster's Avatar
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    I've often contemplated that same thing.

    I can see where an investment in a light meter would be handy.

    (kinda like a TDS meter for our water...)
    Only a moral and virtuous people are capable of freedom; the more corrupt and vicious a people becomes, the more it has need of masters. -- Benjamin Franklin

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