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Thread: 400w or 600w MH in my setup?

  1. #1

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    Default 400w or 600w MH in my setup?

    Hello sorry to keep asking questions, but I have a sol 600w hps dual spec at the moment but am going in to invest in a mh for veg tomorrow! My tent is 120?120?2.0m with a digital ballast with 250w 400w 600w and 660 boast control.
    Instead of having to mess around dimming bulbs etc what would be best me getting, a 400w mh or a 600w mh?Thanks again!

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  3. #2
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    i have both the 400w mh & 600w mh
    the 400w for early veg, the 600w for the stretch period during flower

    it's upto you if ya think u need either,


    lots don't bother and grow duel spectrum from start to finish so it's just what i prefer

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  5. #3

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    Happy days I will go for the 400w to start then then maybe get the 600w later see how I get on, thanks dude just doubting myself lol ain't grown in a while

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  7. #4

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    I got both as well brother but i use the 400W most of the time but even though you have a dim able ballast they recommend you don't dim MH bulbs, all the best bro', G'.
    FIGHTING FOR PEACE IS LIKE FU#@ING FOR VIRGINITY

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    better to ask than scratch ya head mate

    mH is usually 'veg' they need less light in veg than full bloom 'excluding autos' - that's why you get the 10% boost on ya digital ballast for late flower 660w
    but don't boost a mH or you'll blow the bulb in a few months

    it'll also shorten any bulbs lifespan greatly

    welcome back to growing

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    Quote Originally Posted by G' View Post
    I got both as well brother but i use the 400W most of the time but even though you have a dim able ballast they recommend you don't dim MH bulbs, all the best bro', G'.
    beat me to it G'

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  13. #7

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    Thanks dude yeah I read to stay away from dimming the bulbs, concerned then deep a 400w tomorrow

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    Quote Originally Posted by farmerboy View Post
    Hello sorry to keep asking questions, but I have a sol 600w hps dual spec at the moment but am going in to invest in a mh for veg tomorrow! My tent is 120?120?2.0m with a digital ballast with 250w 400w 600w and 660 boast control.
    Instead of having to mess around dimming bulbs etc what would be best me getting, a 400w mh or a 600w mh?Thanks again!
    Just to throw in my 2 cents. I'm running 2 315w CMH in a 4 x 4 tent. I pulled 15 ounces off of 3 plants my last grow. I also run one in my veg room. I will never go back to LED.

    Sent from my SM-N950U using Tapatalk

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    I start mine off under a 125W CFL then ive got 250W and 400W MH for veg. 600W HPS for flower. As said, dont dim MH bulbs as it throws the spectrum off

    Sent from my SM-G955F using Tapatalk

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