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temp problems
- Thread starter hdn155
- Start date
JohnnyToke
Member
83f is not a bad temp for your grow environment. especially with 2 x 1000's in that small of a space however with 4' in height to work with, you will probably have plant bleach / burn issues as the plants grow taller because your lights will be so close to them.
im actually surprised the temps arent closer to 98f in there. even with the a/c.
as others have stated, 400 or 600's would be the way to go in that cab. save you on the electricity bill as well.
regards,
JT
im actually surprised the temps arent closer to 98f in there. even with the a/c.
as others have stated, 400 or 600's would be the way to go in that cab. save you on the electricity bill as well.
regards,
JT
stke_fingas
Member
[I've just experienced this myself. The problem is your fans are too strong for that size box. You're pulling to much air and it's not having time time to cool the box. Get a speed control for your fan and dial it in.]
that sounds silly to me. not trying to flame or start a shit throwing contest, but i'd vote NO FREAKIN WAY!
i love your dedication my friend, but i agree with johnny, those lights are nuts for that space. you could get away with a 1000w cab if the light(singular) was 4-5' above the canopy. but you got two! lol and half the cab.
try moving more air through the lights, the cooler the light the cooler the cab. if you put a "T" in the middle of those lights and pulled fresh air through both might help. my reasoning is that, by the time the air leaves the first hood it's already hot, then passing over the second hood. not doing much cooling when running hot air over the second hood. inlet temp has a rather large effect on the cooling ability. check with a thermometer on both hoods to see if there is a temp difference. might not be worth doing. just a thought.
light defuser would be a option to help out with the light bleaching, they are already too close to the plants. i'd run grow bags to get the best fit, cram as many plans in there as you can! light penetration is not a concern with this set up. lol
being stealth is obviously not a factor here, and you got enough light to cover two 4x8 tables. a proper 4x8 with a grand over it would easily pull 2 bows. thats 4 every 8 weeks. thats what i suggest you do if you want those lights.
good luck either way.
that sounds silly to me. not trying to flame or start a shit throwing contest, but i'd vote NO FREAKIN WAY!
i love your dedication my friend, but i agree with johnny, those lights are nuts for that space. you could get away with a 1000w cab if the light(singular) was 4-5' above the canopy. but you got two! lol and half the cab.
try moving more air through the lights, the cooler the light the cooler the cab. if you put a "T" in the middle of those lights and pulled fresh air through both might help. my reasoning is that, by the time the air leaves the first hood it's already hot, then passing over the second hood. not doing much cooling when running hot air over the second hood. inlet temp has a rather large effect on the cooling ability. check with a thermometer on both hoods to see if there is a temp difference. might not be worth doing. just a thought.
light defuser would be a option to help out with the light bleaching, they are already too close to the plants. i'd run grow bags to get the best fit, cram as many plans in there as you can! light penetration is not a concern with this set up. lol
being stealth is obviously not a factor here, and you got enough light to cover two 4x8 tables. a proper 4x8 with a grand over it would easily pull 2 bows. thats 4 every 8 weeks. thats what i suggest you do if you want those lights.
good luck either way.
stke_fingas
Member
tony danza made this one.
he said it helps out with the hot spot. diffuser, 2 'f's', my bad.
i forgot you had a ac running, sorry johnny. i was talking out of my ass. i was thinking how in the fuck is less air flow going to cool this oven?
nice time for the "mj affects the memory" to chime in. lol he was saying that you are sucking out the cool air that your ac is making. try turning off your vent and see what your temps do.
time for a Co2 setup if it stays good or better. 85-92* is kickass with Co2. you'll probably have humidity issues though. but all that cost a lot.
he said it helps out with the hot spot. diffuser, 2 'f's', my bad.
i forgot you had a ac running, sorry johnny. i was talking out of my ass. i was thinking how in the fuck is less air flow going to cool this oven?
nice time for the "mj affects the memory" to chime in. lol he was saying that you are sucking out the cool air that your ac is making. try turning off your vent and see what your temps do.
time for a Co2 setup if it stays good or better. 85-92* is kickass with Co2. you'll probably have humidity issues though. but all that cost a lot.
JohnnyToke
Member
seriously, if you have it cooled to 83f and thats a stable temp after a few hours of the lights being on, then it is not to hot to grow in there. plants will do just fine at 83f.
If I were in your situation today, here is what I would do.
I round up about $45 or so.
I build a pvc scrog screen ($15 worth of parts from Lowes / H Depot) to sit about 8" above your plant containers and train them under the screen. this will hold your vertical growth down to 24" or so including buds well into flowering.
I would also use large tubs (Lowes has black cement mixing tubs cheap) that are 24" x 36" with sides 8" tall.
36" x 24" x 8"
Heavy duty plastic construction
Great for mixing concrete, potting plants, bathing the dog, etc. $12.93
you could get 2 tubs, 1 to place under each light. fill with good soil and place 4 -6 plants in each one under your scrog screen.
your tub sits 8" off the floor, your scrog screen 8" above the planting tubs and leaves you 8" more for bud growth and able to remain 2 feet or so under the 1000w lights.
just a suggestion as to what I would do if I had your setup.
im thinking a decent strain in this setup, properly watered, fed and scrogged would pull 2-4 pounds of dried dank out of that cab under 2000 watts.
regards,
JT
If I were in your situation today, here is what I would do.
I round up about $45 or so.
I build a pvc scrog screen ($15 worth of parts from Lowes / H Depot) to sit about 8" above your plant containers and train them under the screen. this will hold your vertical growth down to 24" or so including buds well into flowering.
I would also use large tubs (Lowes has black cement mixing tubs cheap) that are 24" x 36" with sides 8" tall.
36" x 24" x 8"
Heavy duty plastic construction
Great for mixing concrete, potting plants, bathing the dog, etc. $12.93
you could get 2 tubs, 1 to place under each light. fill with good soil and place 4 -6 plants in each one under your scrog screen.
your tub sits 8" off the floor, your scrog screen 8" above the planting tubs and leaves you 8" more for bud growth and able to remain 2 feet or so under the 1000w lights.
just a suggestion as to what I would do if I had your setup.
im thinking a decent strain in this setup, properly watered, fed and scrogged would pull 2-4 pounds of dried dank out of that cab under 2000 watts.
regards,
JT
Last edited:
GrassRoots
Active member
7x2.5, so like 17.5 sq ft with 2000 watts or 114 watts per square foot, DAMN!!!! I'd say if you're keeping your temps at 83 with that many watts you're sitting pretty. I really thought raising that fan to the top would have solved your problems but you're saying no change, that seems odd. Is the air coming out of the exhaust still pretty cold like it was when you had it exiting at the bottom? I would say not to point that ac at the lights because the lights are up top and that's where you exhaust is now. I'd make that a/c blow towards your circulation fan might not make much of a difference but should be better than pointing it towards your exhaust (and lights).
GrassRoots
GrassRoots
hdn155
Member
yeah the air coming out of my exhaust fan if seriously freezing... im going today and getting myself one of those electronic speed control device's for the fan... im hoping if i turn down the fan speed some it will let the ac unit actually do it's job and cool the box... im also seriously considering doing what johnny mentioned above and going scrog with these..... i just wanna do some more research on that.
Z
zoolander
155, If your just veggin those plant right now you could run some t5's and bring your temps and power usage way down. If someone already said this I'm sorry I'm way to lazy to read a whole thread LOL 
stke_fingas
Member
hdn good to hear that you got those temps worked out. funny that the mylar made such a difference.
imo, sog would be the way to go. 1gal grow bags, coco, drip fed, no tub, no veg, jammed plum full of plants(no space between bags at all). 100w/sqft+ above anything sativa dom will be one ultra mega donkeyd%ck kickass single cola. easy trimming and the most production IMO.
don't get me wrong, i love to scrog. i'm doing one now, and will continue to scrog. i'm working on dialing in the v-scrog which is basically sog style more than flat scrog. little to no veg is the key to a fast turn around. leave those lights 12/12 all the time. you could do your cloning in a very small space. that's if you have room for moms. not that it would take much.
my .02
imo, sog would be the way to go. 1gal grow bags, coco, drip fed, no tub, no veg, jammed plum full of plants(no space between bags at all). 100w/sqft+ above anything sativa dom will be one ultra mega donkeyd%ck kickass single cola. easy trimming and the most production IMO.
don't get me wrong, i love to scrog. i'm doing one now, and will continue to scrog. i'm working on dialing in the v-scrog which is basically sog style more than flat scrog. little to no veg is the key to a fast turn around. leave those lights 12/12 all the time. you could do your cloning in a very small space. that's if you have room for moms. not that it would take much.
my .02
2buds
Active member
WOW-2k in that space is amazing. If you get things working you should have NO problem with density in your buds, no fluff for you man. Do you have the hoods sealed? (glass sealing the bottom) If your blowing out cold air then it sounds like your just pulling teh air straight out of the cab. If you ever get the room to expand then you got the light to do it with that's for sure. Glad you temps came down by removing the mylar. As it was said, be careful that you don't end up with light bleaching on your tops. Tell no one and you'll sleep better at night.
hdn155
Member
yeah tho hoods are sealed with glass and foil tape around the edges to make it as air tight as i can... i am a bit concerned about light bleaching the tops of colas thats why i really like the idea of either sog/scrog, keepin the tops of the plants low to the ground a couple feet away those monster lights.
