400W @ 83F or 600W @ 89F

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guitarguy10

Well-Known Member
MintyDreadlocks said:
Maybe stick with playing guitar?

JK. Bahaha
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I gave up playing the guitar many years ago, this is just a username that goes with an email from that period long past.

I'm a failure at everything that I do, but I need this medicine and can't afford to buy it even at the cheaper prices now that it is legal. It's not like I get no harvest, just airy buds that I hate cuz for indoors it should be dense tasty buds. If you look at the pic I posted of them from yesterday they look nice and green, vibrant, stretching nicely .. I just dont know if 90F is slowing them down.
 

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DarkWeb

DarkWeb

Well-Known Member
guitarguy10 said:
The fan that is cooling the hood is directly attached to it, so the hood is receiving maximum flow (the fan draws air into the hood from inside my bedroom. That ducting coming out is long, in fact my window is on the other side of the room. But the air going into the hood is directly attached to the fan, so I don't think all that extra length for air being pushed out after the hood is too big of a deal, either way not much I can do about it, my closet is across the room from my window. It likely doesnt matter but the hood is oriented such that the air being drawn in flows over the bulb and out (vs the bulb facing the other direction).

The tent is being vented by a 203CFM fan. Perhaps it is hard to see in that picture but there are 2 6" ducting going out that window. One is from the 206CFM fan that is exhausting the tent, the other is from the 403CFM fan cooling the reflector. Attached is a crappy picture I drew a while back (the white boxes are changes, I used to have an active intake fan, which is the box on the right, and i used to have a carbon filter which is the box on the left, but no carbon filter needed now that it is legal).

Those filters are not attached to any fan, it has passive intake and those filters are on the ends of the holes for the passive intake. I had a 4" inline fan giving active intake before but the temps went up by almost 7F, reproducibly.
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You should be pulling air. Pushing it doesn't work well.
 
NukaKola

NukaKola

Well-Known Member
400w is fine, that’s still 50w per square ft in a 2x4. The fact that the tent is also only 5’ tall you want to be able to place the lamp as close to the plants as possible. Yes, more light is generally better but 600w is 75w per square ft which is overkill IMO. I’d prefer slightly less yield of better quality from the 400w than a larger yield of some foxtailed buds from the heat stress of the 600w.
 
xtsho

xtsho

Well-Known Member
guitarguy10 said:
I answered that above.

I was super torn on buying the eye hortilux, I ended up buying it cuz several ppl on this forum told me they were worth it. And light is like probably the most important thing, so I invested wanting a really good crop this time.
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I missed that.

I've used both the Eye and the Vivosun. My setup came with the Vivosun. The first time I replaced the light I went with the Eye. I didn't notice any significant difference so I've been using the Vivosuns ever since. They're like 1/4 of the price. Many people won't admit that some of these "budget" companies have upped their game significantly and are just as good as the more expensive companies that have been around for a long time. I don't like paying for a name unless there is a significant benefit which I haven't found between the 2 lights. Just my 0.2¢.
 
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MintyDreadlocks

Well-Known Member
guitarguy10 said:
I gave up playing the guitar many years ago, this is just a username that goes with an email from that period long past.

I'm a failure at everything that I do, but I need this medicine and can't afford to buy it even at the cheaper prices now that it is legal. It's not like I get no harvest, just airy buds that I hate cuz for indoors it should be dense tasty buds. If you look at the pic I posted of them from yesterday they look nice and green, vibrant, stretching nicely .. I just dont know if 90F is slowing them down.
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I'm not hating brotha mans. Im still learning too I just bust balls.

Biggest thing I learned after a few grows is that reading the information and putting it into action are two very different things. It all sounds easy until shit starts getting ugly.
 
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RadicalRoss

Well-Known Member
MintyDreadlocks said:
I'm not hating brotha mans. Im still learning too I just bust balls.

Biggest thing I learned after a few grows is that reading the information and putting it into action are two very different things. It all sounds easy until shit starts getting ugly.
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"everyone has a plan until they get punched in the face" basically. I know it all sounded a lot easier when I was just watching videos and reading about it. The hardest part for me remains the waiting though, no smash cut to 4 weeks later to see how my flower tent has developed.
 
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guitarguy10

Well-Known Member
xtsho said:
I missed that.

I've used both the Eye and the Vivosun. My setup came with the Vivosun. The first time I replaced the light I went with the Eye. I didn't notice any significant difference so I've been using the Vivosuns ever since. They're like 1/4 of the price. Many people won't admit that some of these "budget" companies have upped their game significantly and are just as good as the more expensive companies that have been around for a long time. I don't like paying for a name unless there is a significant benefit which I haven't found between the 2 lights. Just my 0.2¢.
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Ah yeah I guess that makes sense that these companies have upped their product game. It was definitely a hard pill to swallow paying $120 CAD for a HPS bulb, but these silly forums and I guess fanboys all the info I was finding was only use the good bulbs for noticeably better yields.

MintyDreadlocks said:
I'm not hating brotha mans. Im still learning too I just bust balls.

Biggest thing I learned after a few grows is that reading the information and putting it into action are two very different things. It all sounds easy until shit starts getting ugly.
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Hrm putting stuff into practice for me hasn't been too bad, except that most people when I ask questions don't seem to take into account that I'm not wealthy because most people just tell me to buy this expensive thing (par meter) or that expensive thing (space heater).

That or they just give me conflicting information. A thread I started a few days ago about using Gypsom (calcium sulfate) in promix hp was met with 'don't use it it will never dissolve' to 'it dissolves rapidly' and 'avoid it you don't want flocculation' to 'you want flocculation'. I'm more confused then I started lol.

But forums seem like the best (only) place to really go for specific horticulture information, I wish I knew a farmer. I just wish the information I got was more consistent.

@DarkWeb I will see if I can find a way to change the fan's configuration to pull through the hood. It will be hard though, and will end up with at least 1 90degree turn. Tight quarters giving up half of my closet to a small grow tent. Again though I have heard people say to push, some say pulling over the bulb is better. I'd still like to see like some data, or a succinct explanation before I go tearing down my fans again.
 
DarkWeb

DarkWeb

Well-Known Member
guitarguy10 said:
Ah yeah I guess that makes sense that these companies have upped their product game. It was definitely a hard pill to swallow paying $120 CAD for a HPS bulb, but these silly forums and I guess fanboys all the info I was finding was only use the good bulbs for noticeably better yields.


Hrm putting stuff into practice for me hasn't been too bad, except that most people when I ask questions don't seem to take into account that I'm not wealthy because most people just tell me to buy this expensive thing (par meter) or that expensive thing (space heater).

That or they just give me conflicting information. A thread I started a few days ago about using Gypsom (calcium sulfate) in promix hp was met with 'don't use it it will never dissolve' to 'it dissolves rapidly' and 'avoid it you don't want flocculation' to 'you want flocculation'. I'm more confused then I started lol.

But forums seem like the best (only) place to really go for specific horticulture information, I wish I knew a farmer. I just wish the information I got was more consistent.

@DarkWeb I will see if I can find a way to change the fan's configuration to pull through the hood. It will be hard though, and will end up with at least 1 90degree turn. Tight quarters giving up half of my closet to a small grow tent. Again though I have heard people say to push, some say pulling over the bulb is better. I'd still like to see like some data, or a succinct explanation before I go tearing down my fans again.
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Phnumatics is not hydraulics.......I'm not here to spoon feed. You will be better putting the fan at the end of the run.....not where it goes out of the tent but closer to the end of the run. If you don't want to try it that's you issue.
 
DarkWeb

DarkWeb

Well-Known Member
With a long run of ducting like you have you are compressing all the air on front of the fan. You create positive pressure in the duct. Pulling the air creates a negative pressure. You will not have air in the way.
 
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guitarguy10

Well-Known Member
DarkWeb said:
Phnumatics is not hydraulics.......I'm not here to spoon feed. You will be better putting the fan at the end of the run.....not where it goes out of the tent but closer to the end of the run. If you don't want to try it that's you issue.
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Uh I never asked to be spoonfed anything, nor did I ask for the attitude. If you're so smart perhaps try to spell the word 'Pneumatic' correctly first.
 
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chronnie49

Well-Known Member
I would stick with 400 watts.

Have your temps been in the low to high 80s with your previous grows? If so that could explain the airy buds.
 
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guitarguy10

Well-Known Member
chronnie49 said:
I would stick with 400 watts.

Have your temps been in the low to high 80s with your previous grows? If so that could explain the airy buds.
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Nah those were uh user error for the most part. Eg. a member here advised me a scrog net wasnt needed .. one definitely is cuz they grew into the light, so that fucked up the plants (they still grew buds though just a lot of supercropping, foxtailing and burnt leaves).

Grow before that was with a 240W LED (real watts, it's a telos-008 https://gn.uk/led-grow-lights/gn-telos-8) and that's just not enough wattage IMO for a 2'x4' footprint, at least I wasn't satisfied.

Temps both hot and cold have been issues I've almost always had, largely cuz before recently it wasn't quite legal to do so they were in dressers and other micro spots.

I was hoping that a 200CFM exhaust for 30cuft and a second more powerful 400CFM fan connected to the air cooled hood would help but I think there are just limits to how much heat you can remove from a 30cuft space.
 
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chronnie49

Well-Known Member
Some strains can handle heat better than others so keep that in mind.

The next time you have an extra 30 bucks you should definitely get a laser temp gun so you can check leaf surface temps.

I would definitely stick with the 400 watt with those temps.
 
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ElGrandeMongo

Well-Known Member
guitarguy10 said:
The fan that is cooling the hood is directly attached to it, so the hood is receiving maximum flow (the fan draws air into the hood from inside my bedroom. That ducting coming out is long, in fact my window is on the other side of the room. But the air going into the hood is directly attached to the fan, so I don't think all that extra length for air being pushed out after the hood is too big of a deal, either way not much I can do about it, my closet is across the room from my window. It likely doesnt matter but the hood is oriented such that the air being drawn in flows over the bulb and out (vs the bulb facing the other direction).

The tent is being vented by a 203CFM fan. Perhaps it is hard to see in that picture but there are 2 6" ducting going out that window. One is from the 206CFM fan that is exhausting the tent, the other is from the 403CFM fan cooling the reflector. Attached is a crappy picture I drew a while back (the white boxes are changes, I used to have an active intake fan, which is the box on the right, and i used to have a carbon filter which is the box on the left, but no carbon filter needed now that it is legal).

Those filters are not attached to any fan, it has passive intake and those filters are on the ends of the holes for the passive intake. I had a 4" inline fan giving active intake before but the temps went up by almost 7F, reproducibly.
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I'm trying to figure from your drawing but don't understand (am admittedly rushed).

Is your tent in the closet? Is there a tent at all or is it being grown in the closet?
 
Star Dog

Star Dog

Well-Known Member
guitarguy10 said:
Growing in a small tent (2'x4'x5', 30cuft), so even with massive overkill exhaust fans (sealed hood that has its own dedicated 403CFM fan, and a 260CFM fan (with no filter for air restriction) for exhaust) it still gets quite hot in there.

I am growing under a 600W HPS but the temps get up near 90F. When dimmed to 400W the temps go down to about 83F. What are your guys opinions on which is better, like could I get away giving them more light at 600W and near 90F or should I just sacrifice some of the light they get (so dim to 400W) so that they don't get as hot?

I am growing Blueberry and Peyote Critical in 75/25 coco/perlite w 4mL/L AN Sensi Bloom A + B, 2.5ml Cannazym (with one full application of CalMag and a root stimulator at start). I have no additional CO2 because I can't afford a tank and regulator and also the 260CFM fan exhausting a 30cuft tent = massive air exchange.

They are on day 10 of flower in the attached pic.
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Parabolic reflector will reduce radiated heat drastically, check out the secret jardin daisy, you also get a better light spread than a euro/cheap shade.
 
Buddernugs

Buddernugs

Well-Known Member
Mars hydro tsl-2000 will cover 2x4 perfectly I use them Iv pulled 1lb off them no problem 285$ With 400w hps your going to have heat issues one of them will cover 3x3 area so u would need 2 of them for even light coverage threw out your tent and 800watts is waaaaaaaaaay over kill for a 2x4 tent so I’d go with the Mars tsl2000 not the tsw-2000 the tsl was made specifically for 2x4 tents their really. Nice lights a lot of people bash them but most of them have never used them I have and I’ll tel you 2 tsl-2000 lights will out perform 1000$+hlg lights I no longer run hlg lights their waaaaaay over priced trust me get the tsl-2000
 
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guitarguy10

Well-Known Member
The heat problem is mostly gone now (it gets up to like 77F now only). I followed DarkWeb advice and moved the exhaust fan to pull. The suggestion could have gone without his sarcasm though, I defintely do not know anything about pneumatics OR hydraulics and thus I definitely DO need to be *spoon fed* as he put it on topics I have never taken a course on in my life.

@Buddernugs who would spend $285USD on ANOTHER light when they've already got a perfectly good 600W HID (and also a 240W LED)? I don't sell this weed I grow, why are peoples advice always to go buy more expensive shit .. or buy 2 of them? You guys are either selling the weed you grow or you don't know what financial responsibilities in life are.
 
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