Is there any tower fan you might suggest for my setup?
Is This A Good Setup? 4x4, 1000w HPS/MH, more
- Thread starter ltobe18
- Start date
.Smoke
Well-Known Member
I have 1 bottom screen open for passive intake and it's more than enough.
The fans have done just fine for me so far. No issues at all.
Btw, my first grow I ran 2- 600w hps in that tent with the same exhaust and got 2lbs off 8 autos.
Dont recommend it. Heat was an issue then.
.Smoke
Well-Known Member
Sorry, didn't see a couple of the questions the first time.
The 1- 6" exhaust is all you need.
My basement RH is about 40% so pretty decent. I keep my exhaust turned down to keep temps around 75F and to let humidity come up some. The HPS/MH seems to "burn" around 5% RH out of the tent when running. Plus its quiter/less power.
So long as you are able to supply cool air to your tent and light, HPS/MH still is your best bang for your buck nowadays.
It looks like you really did your homework and I bet you will definitly be pleased with your choices.
The 1- 6" exhaust is all you need.
My basement RH is about 40% so pretty decent. I keep my exhaust turned down to keep temps around 75F and to let humidity come up some. The HPS/MH seems to "burn" around 5% RH out of the tent when running. Plus its quiter/less power.
So long as you are able to supply cool air to your tent and light, HPS/MH still is your best bang for your buck nowadays.
It looks like you really did your homework and I bet you will definitly be pleased with your choices.
I see in your setup you run with SunSystem lights. The 1000w is more than double the cost of the 1000w VIVOSUN I plan on using. What are the advantages of using the SunSystem setup? Is it worth the extra 200?
I did a little further digging and if what you mean by efficient you were referring to other types of light such CMH and LED, then would you suggest a CMH system? It's a lot more upfront cost then I was planning(and am willing).
But lets say I was willing, what wattage for a CMH would be equivalent to a 1000w HPS/MH system in regards to yield and quality? I saw a 315 120V CMH for around $650, which is more than half of what my original startup cost is.
.Smoke
Well-Known Member
When I first got the hps I didn't get air cooled hoods. Once I figured out I needed them I had the extra cash.
I haven't had a Vivosun but will say for $90 on sale now, there's no chance it comes close to the quality of the Sun Systems.
I use it with a $100 Ipower ballast.
I have two flower tents, both 4x4x7'. One has a 600W HPS, the other has a 1000W HPS.
The basement that the tents are in remain about 52F all year. Both of my tents have a 630CFM inline 6" fan and filter combo. The lights have air-cooled hoods, but my ventilation does not route through them, effectively they are not being air-cooled.
The 600W tent gets up to about 74F, and the 1000W tent goes up to about 76F. Both tents have the exhaust venting to the outdoors by way of a wood-burning woodstove chimney that I don't use any longer.
For a 1000W in a 4x4' tent, one needs to have a stable, relatively low temperature in the room the tent resides in, and/or the heat must be exhausted elsewhere. 1000W lamps generate quite a bit of heat, but if managed properly, it will be fine.
I'd say that if my basement temps were above 60F, I'd probably have to run my ventilation through the 1000W lamp to prevent high temps.
Alright with these new recommendations, I plan to switch out my VIVOSUN 1000w HPS/MH for this set up:
iPower 1000w electronic ballast
iPower 1000w hps bulb
iPower 1000w mh bulb
Sun system reflector 6” air cooled reflector
which ends being 50 bucks more, but its doable.
Will this work? I'm not missing anything for a proper light setup, am I?
I will be air-cooling my 1000w with an exhaust to outside, maintaining room the tent is in at 65F. And passive intake. Think it'll work?
Couch_buzz
Well-Known Member
MH/HPS is powerful lighting but cannabis plants don't utilize some of that spectrum, as a result you need to use more POWER (more heat, higher energy bills) with MH/HPS. HPS is still excellent for flowering, though. MH is not the best for veg. If you do winter grows, in a cool environment (or AC near plants) the HPS heat is manageable. Modern LED's are super efficient, but not all LED's use the best diodes, heatsinks or power supplies and drivers.
Clip fans won't cool off the entire plant well. Specific areas , yeah. Get you a 4 foot or so oscillating tower fan and a clip on or another secondary fan and you have good air circulation, which is critical. More wind + more light= THICK STEMS and STALKS
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Couch_buzz
Well-Known Member
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Chip Green
Well-Known Member
Not sure what more, one could ask for, when it comes to vegetative growth lighting.
Traditional MH has really been the gold standard for a long time, for pretty good reason.
Couch_buzz
Well-Known Member
Have u tried CMH, Chip? I like those best for veg. Just got tired of my head hitting the cheap reflectors and bulb dimming or going out. Although my 3500k spectrum 550V2 Rspec has outdone my CMH's.......my plants are 12" high after a month, 7 sets of leaves...can't even see stalk and barely stem AT ALL.
Chip Green
Well-Known Member
I have multiple CMH fixtures. Indeed they are fantastic. I can't disagree that they offer superior spectrum, over a traditional MH.
But, for simplicity and cost savings, nothing wrong with the basics.
But, for simplicity and cost savings, nothing wrong with the basics.
.Smoke
Well-Known Member
Not missing anything major. Some 6" flexible ducting and some aluminum tape maybe.
Temps should be just fine. Throw some pics up when its setup.
Best of luck!
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.Smoke
Well-Known Member
Also,
Get a piece of 1/2 inch split insulation for PVC pipe. You can cut a small piece, place it around your poles and it will give your fan something to clip onto.
Get a piece of 1/2 inch split insulation for PVC pipe. You can cut a small piece, place it around your poles and it will give your fan something to clip onto.
JoeBlow5823
Well-Known Member
Im running a single 1000w Sunsystems AC/DE setup in my 5x5. Veg with MH at 1000w flower with HPS at 1100w
6'' ducting is fine my fixture temps at 85 degrees its not even warm to the touch even with the fan running on LOW. And I push the hot air to my basement. The fan creates negative pressure in the tent pulling air in through the bottom vents. The room/tent receives a constant supply of fresh upstairs air. You'll have to imagine ducting where the arrows are. And yes that is a 6'' fan attached to a 8'' filter. Bigger filter=better flow and longer life.
4 oscillating fans on low/medium speed to keep the fresh air moving under the canopy.
And one oscillating fan above the canopy.
This year was autos, getting everything dialed in. Next year will be photos. I just do one grow during winter so that temps are easily controlled and all that heat coming from the light goes to good use heating the house.
Anyway the point I was getting at is that single ended bulbs are a thing of the past. You would be much happier running a 600 or 750w double ended for a 4x4. Double ended bulbs are 20-30% more efficient so suddenly your 600w bulb (boosted by 10% to run at 660w if you please) is throwing down about the same amount of light as a single ended 1000w. I am extremely happy with the sunsystem AC/DE hood and I will be running this setup for years to come.
6'' ducting is fine my fixture temps at 85 degrees its not even warm to the touch even with the fan running on LOW. And I push the hot air to my basement. The fan creates negative pressure in the tent pulling air in through the bottom vents. The room/tent receives a constant supply of fresh upstairs air. You'll have to imagine ducting where the arrows are. And yes that is a 6'' fan attached to a 8'' filter. Bigger filter=better flow and longer life.
4 oscillating fans on low/medium speed to keep the fresh air moving under the canopy.
And one oscillating fan above the canopy.
This year was autos, getting everything dialed in. Next year will be photos. I just do one grow during winter so that temps are easily controlled and all that heat coming from the light goes to good use heating the house.
Anyway the point I was getting at is that single ended bulbs are a thing of the past. You would be much happier running a 600 or 750w double ended for a 4x4. Double ended bulbs are 20-30% more efficient so suddenly your 600w bulb (boosted by 10% to run at 660w if you please) is throwing down about the same amount of light as a single ended 1000w. I am extremely happy with the sunsystem AC/DE hood and I will be running this setup for years to come.
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SmokeyMcChokey
Well-Known Member
So I ran tents for a few years before converting the room and a 4*4 tent was always a bit tight. If you have the floor space a 6*6 will give you a bit more room around the periphery to work with come late flower. Everything else seems fine. It's more or less what I'm running still on my 2 site runs. No need to add a co2 regulator with the air-cooled hood. Chances are it will get too hot for the periods that you stop running the exhaust during co2 injection periods. I typically only advise co2 if you've pretty well maxxed out production of everything else and you are consistently running in the 80-90°f range. Just my two cents for whatever that's worth.
SmokeyMcChokey
Well-Known Member
Do they not still advise against air cooled hoods for the de lamps? I thought they needed to run hot or you'd kill lamp life and get a screwy spectrum.
Ahh nevermind.i see they're doing a lamp chamber and cooling the chamber above now. Seems a little inefficient since you're basically just trying to cool the hood and you're not actively pulling hot lamp air out of the room. But I guess I'm some cases even 3-4 degrees f make a huge difference
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SmokeyMcChokey
Well-Known Member
This is the true answer. I have run 4 315 cmh in a 6*6 and 2- 630 de cmh in a 4*4 and I almost always supplement with hps still. Maybe I'm just used to what I know works but I find the daylight spectrum in flower produces less compact internodal spacing. I still veg with a single 630 in a 5*5 area and just swap to my old 1k hos with ushio lamp a couple weeks after flip. If I do a 4 site run I'll stick the 630back in to fill some area and alternate lamp placement weekly. I'm pretty sure it's not really needed but I like to spend a few hours away from the wife and kid a couple times a week so I go with it.