400w Club-Show Off Your 400w Pride And Joy

groputillor

groputillor

Active Member
Golddog - Recommended height for 400watt is 18 inches but I start it as high as I can to get them used to the change from floros. They will love every lumen you give em by bringing lights closer as long as they don't take on extra heat. Just know the temps at the tips for sure. I'm told if we can keep it cool and get it close we can get 600 watt size buds out of our 400 watters.

Smokin Guns - nice lookin show ;) I think people usually get about 25% of the wet weight but that's still a mighty pull from one plant. Good lookin on keepin the light close. I don't think people push that limit enough and it's so easy. You can tell from the bud swell you've got on those tops
 
doctorD

doctorD

Well-Known Member
with my vented hood it sits about 12" above the canopy. I just put my hand at canopy level and if I cant feel the hear radiating from the bulb i lower it till i do then raise it a few inches.
 
BigSkyBudTHC

BigSkyBudTHC

Active Member
smokinguns said:
We tried to post a few pics yesterday but it wouldn't let me so, here is one of "Buds n Boobs". I was trying to start a new thread under that title. Maybe I will try again later.

Nic boobs eh? Yeah, I like em to. So, about the bud..............It's Ice from Nirvanna and it went a whopping 10 flowering weeks in a dwc. I though it would never finish. I topped it and I wound up with these bigs ass colas. Actually 6 main colas. Get this, the entire plant under a 400 hps gave me 15 zips of bud. Yes, I shit myself. It's still wet so it will probably drop 1/2 that weight. Air cooled light with a table fan kept it cool. At times I had the light as close as 6 inches.
What do you all think? Peace!

Click to expand...
uh...um...ohh...um...ohh...wait what? they look very nice main. ++++rep
 
golddog

golddog

Well-Known Member
Light is still 20 + inches from the tops and I have a remote thermometer sitting right on the res.

After I figure some of this out, I will get a air-cooled hood and vent my box.

Thanks for the info +rep , not alot of information on using MH on this forum.

Peace - :peace:
 
greenearth5

greenearth5

Well-Known Member
I had my 400HPS 6 in above my cool tube but i had no exhaust.. my therm showed 110 during peak hours but i just moved it to around 12-14 in above and my temps now read 90 which is a hella better... i bet this is why my blue widow seed died after barley poking thru the soil
 
1STxTimeGrower

1STxTimeGrower

Member
this is my 400w system from HTG SUPPLY.COM anyways this is from start to semi finish im in the 4th week of flowering . i had i male mix in with the 4 plants so once i found out it spouted cock and balls i cut sliced him up like a butcher lol now that i removed him every thing seems to be ok .
 
groputillor

groputillor

Active Member
greenearth5 said:
I had my 400HPS 6 in above my cool tube but i had no exhaust.. my therm showed 110 during peak hours but i just moved it to around 12-14 in above and my temps now read 90 which is a hella better... i bet this is why my blue widow seed died after barley poking thru the soil
Click to expand...
90ish is about where most strains' growth is stunted. You can totally work with that, but it's just gonna mean lower yeilds, skinny poopy buds.
 
tom__420

tom__420

Well-Known Member
greenearth5 said:
I had my 400HPS 6 in above my cool tube but i had no exhaust.. my therm showed 110 during peak hours but i just moved it to around 12-14 in above and my temps now read 90 which is a hella better... i bet this is why my blue widow seed died after barley poking thru the soil
Click to expand...
Upgrade your exhaust or your end harvest is going to majorly suffer dude
 
greenearth5

greenearth5

Well-Known Member
Unfortuantly i cant get any upgrades till the end of jan... 100 bucks for a fan is to costly for me right now... if i can i will upgrade ASAP but i gotta find a cheaper method
 
Dr.RR

Dr.RR

Active Member
tom__420

tom__420

Well-Known Member
That fan for exhaust will be enough for a 400 watt light
I am using 306 CFM to cool my 400 watt cab
It is going to put out some nice but any fan of that size will be pretty loud
 
greenfirekilla420

greenfirekilla420

Well-Known Member
You don't persay need two fans but then your gonna have to be at the house every day twice a day when the light comes on and when the light goes off to open and shut the passive intakes. I'm currently in a growlab tent the 2x2x5'3". It gets mighty hot in there so I use two exhaust fans. Works great with the way I have it set up. Next grow season I plan on buying another inline so I don't have to open the vents and what not.

:leaf::peace::leaf:
 
doctorD

doctorD

Well-Known Member
No no no . you can use one fan and not have to be around for anything. You can see the fan set up i use in the pic. The intake is passive but I use a 6" alum flex tube. Its stretched out to say 8 feet along the floor in a few s turns so no light will bled up the intake. Works great and no light leaks. .
 

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greenfirekilla420

greenfirekilla420

Well-Known Member
I agree to disagree there man. In my case YES i have to be here twice a day. Your tent looks twice as big as what I was talking about. I've tried what you suggested it didn't work. My fans suck the walls of my tent in very hard during the off hours, and thats just with the carbon filter fan running not counting the fan to cool the light.

:leaf::peace::leaf:
 
doctorD

doctorD

Well-Known Member
Sounds like you need a bigger intake to let that fan breath. Neg pressure is great in a grow but you don't want the tent to collapse. I have my fan on 24/7 and it doesn't differ lights on or off. Hows yours set up that it does? I hope you get it figured out. Good luck
 
greenfirekilla420

greenfirekilla420

Well-Known Member
Thats with all three of the 4" ports open they have dryer ducting in them with the tops of panty hose doubled up and rubberbanded around the ends for light blocking. I leave the carbon filter fan on 24/7, the inline to cool the light is in sync with the light. I've got it to where it doesn't suck to hard anymore. Last grow it took some practice. But now if I'm not home to open the velcro ports its not so much of a deal as last grow. Even though the tent is twice as full bwhahahahah.

:leaf::peace::leaf:
 
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