400 or 600 watt HPS for Autos

Just trying to get some feedback from this experienced community. I have a 4x4x6.5 tent and I'm having trouble deciding which system I should go wit for autos. Recently I ordered a 600 and had to send it back through the mail because it showed up broken... If anyone has a similar setup I would love to hear what you have and how it's working out for you (might help me make up my mind a little more) thanks...

Come on people, someone has to have some experience with these similar conditions lol

in that space I'd go with the 600. IIRC a 400 only covers a 2.8'x2.8' space. If you look around the rest of the forums, there's tons of info available on this subject. Read first, ask questions when you've exhausted all other options

I use a 400 watt and grew 6 plants with it this past harvest, 4 white widow, 1 bad seed, 1 mendo purps. With the 400 watt i averaged 4 oz per plant like clockwork. If your gonna do anymore then 6 plants then i would go with the 600, not much of a price difference but alot more lumens.

I would opt for the 600 watt hps in spaces that big. I have a 40 inch by 40 inch with a 400 hps and I wish I would have bought the 600 , But the 400 would work too, just not a optimum as a 600

Thanks guys! Your insight is truly respected and appreciated...

Khet said:

in that space I'd go with the 600. IIRC a 400 only covers a 2.8'x2.8' space. If you look around the rest of the forums, there's tons of info available on this subject. Read first, ask questions when you've exhausted all other options

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Guess I just don't know how to use this site yet, lol I surf around a lot on here but I must have skipped over something?

600w
bigger is always better aslong as you can keep the temps under control and have enough vertical to handle it
the 600 has so much more penetration
i run a 400w and love it
after a little research i found that my limited vertical would not allow me to run full power in my box it would be a bleach fest so i got the 400 and am more then happy with it

and my 400 covers a 3x4 space very well im sure others will tell you the same thing

a 400w would be adequate dont let anyone tell you any different
there have been many grow successful with that setup

1000 watt dual arc .............it has a 400w mh and a 600w hps in one bulb cost 160 bucks but they are great for autos whole way tho

use this ballast .................if u think i am wrong u can lower it to 400 or 600......................but i know i am right and u will love this with a built in time and the whole system it is once u read and use it

gtran said:

I use a 400 watt and grew 6 plants with it this past harvest, 4 white widow, 1 bad seed, 1 mendo purps. With the 400 watt i averaged 4 oz per plant like clockwork. If your gonna do anymore then 6 plants then i would go with the 600, not much of a price difference but alot more lumens.

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A pound and a half from a 400 watt light?

Right on Tek! Keep up the good work...ya know what your doing

i also run led's but only 270w 2 135w ufo's and theyre not always running just when my box is packed
i may not be running them i had them in a cabinet by my kitchen sink and a water line broke last night they both got filled with water ill let them dry out and see how bad they smoke when i plug them in lol

tekdc911 said:

i also run led's but only 270w 2 135w ufo's and theyre not always running just when my box is packed
i may not be running them i had them in a cabinet by my kitchen sink and a water line broke last night they both got filled with water ill let them dry out and see how bad they smoke when i plug them in lol

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ah shit that sucks tek! Maybe put them in a bowl of rice and an Asian will come fix em! hahahaha

tannersmokin247 said:

A pound and a half from a 400 watt light?

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That is correct. Each white widow produced just under 4oz each, my bag seed plant produced almost 5oz and actually my mendo purps only produced a little over 2 oz so yes, about a pound in a half with a 400 watt light using DWC with a drip system running 24/7. GH 3 part for nutrients with a compost tea additive.

gtran said:

That is correct. Each white widow produced just under 4oz each, my bag seed plant produced almost 5oz and actually my mendo purps only produced a little over 2 oz so yes, about a pound in a half with a 400 watt light using DWC with a drip system running 24/7. GH 3 part for nutrients with a compost tea additive.

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I'm assuming those aren't autos

tekdc911 said:

i also run led's but only 270w 2 135w ufo's and theyre not always running just when my box is packed
i may not be running them i had them in a cabinet by my kitchen sink and a water line broke last night they both got filled with water ill let them dry out and see how bad they smoke when i plug them in lol

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That's some shit-astic luck there! Hope you can turn that one around man.

I reckon a digital ballast with 400 and 600 that way if heat is an issue in the summer you can feed it 400w bulbs, and if the heat isn't a problem stick in a 600.

I would go 600 or get a dial a watt ballast like suggested and you can always put it on 400 when it's too hot for the 600.

Thanks guys! The heat issue has been giving me a little bit of a problem. So I will def be considering the dimmable 600. Hopefully that will help me alleviate this issue... I might just have a inefficient brand when it comes to a fan/filter combo? It's a 20 lb carbon filter with a 440 cfm inline fan and I think it's made or sold through/by MIX WHOLESALE... I would think that would of been plenty? What do guys think, any suggestions???