new grow room 250w or 400w hps?

GypsyBush

Well-Known Member
Hey my friend I'm new here..so what do you do run air at the cooltube 24-7...I've been looking at this light and was wondering how many plants it coulc cover..

Let's say I do auto-flowering from seeds..

Maybe 8, or so

The answer to your question is not straight... it depends on the size of the plant...

You just saw 3 plants under 1200 watts...

Now I am going to show you 48 plants per 600 watts... in my SOG...

If you pruned for single cola you could do the same with the Autos... but 36 under a 400w... in a 3x3'ish tray...









 

GypsyBush

Well-Known Member
it sometimes gets up in the 90s but rarely. summers almost over.
yes its a closet.
have you looked at the pictures? i have two 4 inch tubes running in and out of the closet

i have no need for a carbon filter, i'm not worried about the smell

I did see the pictures... but they did not help me "paint the big picture"...:lol:

No worries though...

For best results, I would isolate the light... with it's own fan, as well as intake/exhaust...

Keeping the air separate gives you the best heat fighting and temperature control capabilities...

But you can leave on end open in the op... and double that as your exhaust...

You just need to MAKE SURE the fan runs with the light... thus killing some of your temp control... but it requires only one fan...

I would leave the intake passive... and use every last cfm to get rid of the heat.. exhausting it...

...

As for 90F... you will have problems with that...

You can expect a properly ventilated, ENCLOSED grow-op to be 5F warmer than the ambient temperature of the room where the tent/closet is in...

I hope summer IS almost over... or you will have troubles..

What temperatures are your plants seeing right now?
 

ForcedInduction

Active Member
I did see the pictures... but they did not help me "paint the big picture"...:lol:

No worries though...

For best results, I would isolate the light... with it's own fan, as well as intake/exhaust...

Keeping the air separate gives you the best heat fighting and temperature control capabilities...

But you can leave on end open in the op... and double that as your exhaust...

You just need to MAKE SURE the fan runs with the light... thus killing some of your temp control... but it requires only one fan...

I would leave the intake passive... and use every last cfm to get rid of the heat.. exhausting it...

...

As for 90F... you will have problems with that...

You can expect a properly ventilated, ENCLOSED grow-op to be 5F warmer than the ambient temperature of the room where the tent/closet is in...

I hope summer IS almost over... or you will have troubles..

What temperatures are your plants seeing right now?
i will take some more tomorrow maybe but heres a better picture of what i want to do.

i just got an air conditioner set up so it wont be that hot anymore, but those ladys that are about ready have seen some hot days.

right now with just the cfls its about 76
 

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GypsyBush

Well-Known Member
Ditch the intake fan and use it as another exhaust...

What kind of fans do you have anyways? ans how many? cfm?type?

How many CFLs you are using and holding 76F...

Chances are you will be able to hold the same temps with a cooltube and a strong exhaust...
 

ForcedInduction

Active Member
well i have a squirrel cage fan, idk the cfm but it spins at 3020 rpm. and i have two 4 inch desktop fans.
i'm trying to avoid drilling anymore holes so i want to keep the one intake and one exhaust

right now 4 30w and 2 42w bulbs
 

GypsyBush

Well-Known Member
I'd say you will see similar temps with the cooltube...

But I'd really like to know how many cfm it is before I can tell you for sure...

and what are desktop fans... just the small circulating fans?

and you do not need an intake fan... air WILL get sucked in... save the power if you do not need the extra exhaust...;-)
 

ForcedInduction

Active Member
i have no idea how many cfm's it doesn't say it on the label. it came from a big wood stove.
yes they are small circulating fans.
i will probably just use them to circulate air around the room
 

GypsyBush

Well-Known Member
well.. unfortunately we will only know if it works when you hook it all up...

I'd say you need a bare bone minimum of 100cfm... 150 being ideal...

But ultimately... the temperature is the number we need to look at...:lol:
 

GypsyBush

Well-Known Member
Best of luck mate.. keep me posted...

If things start happening and I don't show up.. feel free to send me PM...

I subscribe to a LOT of threads...:razz:
 

fever

Member
why not just do the 250 and some flo? You already have some flo's and that's working good. Not going to have money later....? I'm sure one or two of your "peeps" would thro you a couple of bucks for some bud at harvest. Get a piggy bank put that away and if you still want to upgrade you have some dollars stached.Oh I would get a digital blast so if you do upgrade later to the 400 you can use the 250 MH functions for veg.
 

ForcedInduction

Active Member
Best of luck mate.. keep me posted...

If things start happening and I don't show up.. feel free to send me PM...

I subscribe to a LOT of threads...:razz:
thanks, i'm sure you will be hearing from me very soon:)

why not just do the 250 and some flo? You already have some flo's and that's working good. Not going to have money later....? I'm sure one or two of your "peeps" would thro you a couple of bucks for some bud at harvest. Get a piggy bank put that away and if you still want to upgrade you have some dollars stached.Oh I would get a digital blast so if you do upgrade later to the 400 you can use the 250 MH functions for veg.
how about the 400 and some cfls?
i need to keep all the bud i get at harvest. selling some would leave me with very little bud.
what i have been doing is taking a little bit out of each paycheck and setting it aside. i have $100 so far and i need $110 more. hopefully by early next week i will be ready to order.
i would love a digital ballast but way to much $$$
 

GypsyBush

Well-Known Member
Digis are nice...

I like the fact that I can run HPS or MH... 110v or 220V... and HTG's run super cool...

But in all reality, a magnetic ballast will last much longer... even if it gets really hot...

If you HAVE to keep the ballast inside of the op... you might want to consider digi...

but if you can put the ballast out of the grow space somewhere, heat is not really a prob...
 

ForcedInduction

Active Member
i would rather have a magnetic ballast. i could buy a cool tube with the money i saved not buying a digi. plus if it lasts longer and is cheaper....

i will be keeping my ballast outside my grow room so no problem there
 

Crystal Intake

Active Member
if it was me i'd go with guana soil, biobizz bloom, topmax, bioheaven and use the 400 watt with a 6 inch cooltube and one 125 mm fan. buildit on the one ducting...example : carbon filter-ducting-suckingFanblowinginto-cooltube-ducting-outake(out the top of room if possible) you'll need two small clip in or sway desk fans. with the 400 watt and a cooltube you may still have some heat isues due to the small width so u may need to go 250W as i have tried and tested a very similiar space with 400w and cooltube and temps where 30-32. ideally u be wanting 1metresquared with the above setup that way u will keep 20-25 temps alltime. in winter u will be able to fire in a 600w and may need to use heater during winter nights also. i think u be besy going with soil to start with as hydro can get expensive and if u dont know what your doing can have chain reaction failures.

i have two ancient magnetic ballast at mo but i will be moving to digi next time round to save little bit of energy/money/buyinglamps and i can throw away my MH conversion bulb LOL plus plus plus the digi has a super switch that u can boost 30 percent more energy out of a hps which i would activate on 3rd week of flowering :)
 

ForcedInduction

Active Member
if it was me i'd go with guana soil, biobizz bloom, topmax, bioheaven and use the 400 watt with a 6 inch cooltube and one 125 mm fan. buildit on the one ducting...example : carbon filter-ducting-suckingFanblowinginto-cooltube-ducting-outake(out the top of room if possible) you'll need two small clip in or sway desk fans. with the 400 watt and a cooltube you may still have some heat isues due to the small width so u may need to go 250W as i have tried and tested a very similiar space with 400w and cooltube and temps where 30-32. ideally u be wanting 1metresquared with the above setup that way u will keep 20-25 temps alltime. in winter u will be able to fire in a 600w and may need to use heater during winter nights also. i think u be besy going with soil to start with as hydro can get expensive and if u dont know what your doing can have chain reaction failures.

i have two ancient magnetic ballast at mo but i will be moving to digi next time round to save little bit of energy/money/buyinglamps and i can throw away my MH conversion bulb LOL plus plus plus the digi has a super switch that u can boost 30 percent more energy out of a hps which i would activate on 3rd week of flowering :)
dude you must be on the other side of the lake, your confusing me with the metric measurements! :shock:

so i'm buying a 400w system with a 6" cooltube from HTG supply
i have two 4" desktop fans which i will be using to push fresh air in and circulate air around the grow room.

i just put an A/C in so the temps are staying real low.
i wont have any money to put in a 600w in the winter, although it would be nice...
the 400w will be plenty though. plus a bunch of 30w and 42w cfls

i have to use soil anyways because i can't afford a hydro set up right now:cry:
but as soon as i get the money i'm switching over, maybe i will win the lottery or something?
i definitely have the knowledge, i am certain.

a digi would be nice, but again, i don't have the money...
i won't need a MH conversion bulb because i am using cfls as well. i want to stick with just the HPS for now
 

Crystal Intake

Active Member
dude you must be on the other side of the lake, your confusing me with the metric measurements! :shock:

so i'm buying a 400w system with a 6" cooltube from HTG supply
i have two 4" desktop fans which i will be using to push fresh air in and circulate air around the grow room.

i just put an A/C in so the temps are staying real low.
i wont have any money to put in a 600w in the winter, although it would be nice...
the 400w will be plenty though. plus a bunch of 30w and 42w cfls

i have to use soil anyways because i can't afford a hydro set up right now:cry:
but as soon as i get the money i'm switching over, maybe i will win the lottery or something?
i definitely have the knowledge, i am certain.

a digi would be nice, but again, i don't have the money...
i won't need a MH conversion bulb because i am using cfls as well. i want to stick with just the HPS for now
sounds good man, you can't go wrong with soil. make sure its a good brand tho with all the goodies init that way you can feed the plants water ONLY rite up till 2ndor 3rd week of flower then u can fire in some bloom feed, bloom boost & plant stimulator.

the bigger the pots the better 4-5 galon b4 u flower or shortly after. topping the plants worked wonders for me also aslong as you leave them to veg for atleast 2 weeks after an you'll get alot more heads.

good luck, hope to hear soon.
 

GypsyBush

Well-Known Member
The only reason I would suggest HTG over that one are..

I have dealt with HTG...

Other than that...:eyesmoke: it's pretty much your choice...
 
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