Learning247

Hey guys/gals,

I am putting together two room side by side which will have the same dimensions which will be 6L x 2'.5W x 7'H. Now my issue is in the veg room. I either do 648W florescent (60,000 Lumens) or 400W HPS? (50,000) Lumens.

Both rooms are going to be air and light tight so I will need to exhaust heat, however here is my question?

1. Which one will generate more heat in my grow room?
2. Which one do you think I should go with?

The 648 Watt florescent lights are 3 of these Hydrofarm - Hydrofarm FLP44 T5 4Ft/4-Tube Designer System w/ Bulbs

I was going to have 1 on top of the plant and 1 one on each side of the plants using the lights above.

If you look at Lumens to Watt ratio the HPS wins (I think) however I think it will generate more heat.

Help!

Thanks,
Learning247

Bobbito Blaze

The room your talking about sounds a little narrow 2 1/2 feet thats goona be your problem small rooms with big lights is a catch 22 The flourecent you posted is ok but. Personally I would go for a HPS/MH with adjustable power out put. In your other post dont get me worng the grow looks good . But I bet you would beef up your crop with a HID much more and over all production. compared to a 400w MH those LED's and CF just dont produce like they due. Heat will be a issue but nothing a Exhaust cant handle

Learning247

So your saying even with the room size I have, I should still go with HPS for Flowering?

Thanks,
Learning247

Bobbito Blaze

Are you gonna have a exhaust? Idealy you want a Exhaust with a fresh air intake but aslong as toyu push air out you would be good in your case I would get one of those Tube hoods you hook your duct right to it and the other end to your fan and pulls all heat right out some thing like this http://www.wormsway.com/product_cat.aspx?cat=LITR .They sell cheaper ones but you know hat I'm talking about.Im telling you if you want to grow big monster buds your gonna need to buy a HID and nowa days it pays just to buy all in one mh/hps

Roach

floro's for the veg and hps for the flower. since you have both now, and will need them soon (if you're cloning those other moms)

with the venting Bobbito mentioned.

for this grow (since you're going from clones right ?)

If you're still not satisfied with the Quantity/quality, then reach in those deep pockets and buy a combo mh/hps.

to answer your questions...

1. Which one will generate more heat in my grow room?...the hps

2. Which one do you think I should go with?...the floro (because you have it) for veg.

color temp of the floro's is... 6400K

thats near sunlight.

__________________

לזיין את הקופים

Bobbito Blaze

Not shooting anyone down but I beg to differ you can get a 6500k MH

Roach

he's already got like 600 bucks worth of light.

not saying what's best, just trying to get some green out, of the green he's already put in.

know what I'm sayin'

out of a choice of a or b, he probably doesn't wanna hear c.

__________________

לזיין את הקופים

Roach

also learner, I've forgotten...

did you pull some clones off your first grow's mom ?

__________________

לזיין את הקופים

farmergiles

I'm going to fly in the face of ganja convention here and say that if the hps has the ballast mounted outside the cab it will produce no more heat than flouro's of the same wattage, in fact less compared to the amount of usable light generated.

Why? Conservation of energy. Almost all of that energy ends up as heat, Fluoros or HID. In any case HIDs produce higher lumens and PAR.

A HID light is more likely to burn plants because all the light and heat is coming from one point. With flouros (especially T4s) the light and heat are gently spread out. But even if you go with flouros you are still going to need a decent exhaust fan to stop the ambient temp in the cab from climbing too high.

Bobbito mentions air cooled reflectors- when used with a half decent fan these are excellent for cooling- however some light is lost as the light passes through the glass (especially if the glass is not absolutely clean).

"Cool tubes" are cheap and easy to set up in different configurations- here's a pic of one.


Fluoro's are easy. The bulbs last well and are cheap to replace. The light penetration is poor but this doesn't matter so much in veg- the plants will not be so tall as later on in flowering.

Your space has a footprint of 2.5' x 6'?- this is a little awkward for one HID as the ends will get less light than the middle.
This could in fact used to advantage- you could keep vegging plants in the bright space under the light and clones and mother plants in the more dimly lit ends.
Or you could run a light mover.
Or you could run 2 250w HIDs.
Or you could run a 250w HID with some extra fluoro lighting at the ends.

Sodium bulbs produce a yellow/reddish light that is more suited to flowering than veg. You can veg under sodium but plants prefer more blue light in veg.
For that reason, if you did decide to run a HID for veg I'd go for MH or CMH (ceramic metal halide) rather than sodium.
CMH bulbs run on magnetic sodium ballasts, not digital (unless the digi ballast is specifically designed to run CMH bulbs).

As mentioned by other posters above, those new fangled dimmable digi ballasts can be very handy, especially if there is a heat wave.

If you were running flouro's you could manage with less headroom, or even have shelves (tho you wouldn't really need all that space tbh).

As a rule of thumb, 200w of veg space can supply 600w of flower space (if you're running perpetual).
So it might make more sense to have a bigger flowering space than veg space- Could you make the rooms with footprints of 2' x 5' for the veg room and 4' x 5' for the flowering room?

From which side of the rooms will you gain access? If you can only access from one end of 2.5' x 6', it will be difficult to get to the plants at the other end.

Whatever lighting spec you decide on make sure your ventilation is up to the job of cooling it- you will save a lot of hassle in the long run and your plants will thank you for it.
More commonly than not, ventilation not lighting is the limiting factor in indoor grows.

Have a look in the FAQ- Lighting Issues

__________________
Cultivate a stoic calmness

Bobbito Blaze

That's the fixture I had in mind farmer Giles is displaying a little cheaper then the one I showed u usually both work just as well.I have to agree with farmer Giles you room size is no good you need a bit more with hey how about instead of having two rooms you make 1 big one and decide it up hight wise place a large wooden shelf you can have a larger flower space below allu need on top is enough room to veg put you fluro on top a hid on bottom sounds more practical to me

Learning247

Hey guys/gals,

Thanks for your response(s). Very helpful . So, the two area that is going to be side by side are going to have two seperate doors. Now I am going to make some adustments so I can have two rooms that are 6L x 3W if that helps. I can't make them any more wider that, because I have an object in the way that I cannot move.

Now I can make it so that I have two equal size rooms OR:

veg room is 4L x 3W (Mommy Plant, Clones,)
bud room 8L x 3W (Um, flowering clones)

I begin construction tomorrow so please give me any helpful tips. I only have 1 shot at this.

Thanks,
Learning247

Bobbito Blaze

I still have to agree with FG the room is to long not wide if you want to fill it 1/2 way with a crop you will best off with a light mover. And will be hard to tend to plants in the back. Honestly if your not gonna breed. It would be much better to stack the room veg on top flower on bottom. Thats what I would do in that case some times what you want and what is best becomes a fork in the road. If your going out of your way to dedicated a room to your grow. Best done right or you will be waisting money time and quality and production.

Learning247

I love you guys/gals for your input and your honesty is worth more than anything. So here is my plan for tomorrow, if you don't like this idea please speak now or forever hold your peace, cause in 10 hours from now construction is going to commence.

What I can do is this...... Total space of 9 feet long and 4 feet wide.

***Instead of 12 feet long and 3 feet wide***

How would you divide this for veg and flower ???

Thank you again for your input, I really appreciate it, I would show you my appreciation with some bud/seeds/clones but I can't, for now. <-- keyword is "for now".

Thanks,
Learning247

Bobbito Blaze

8 ft ceiling?

Learning247

Yes, but the lights will probably go as high as 7 feet.

farmergiles

-You need more space for flowering than for veg, especially headroom, but also floorplan.
-You could have a smaller veg space and divide it into 2 shelves.
-If possible you want easy access to both spaces without having to move plants around. Otherwise you'll have to levitate or something .
-Long narrow rooms can be tricky and restrict your set up options.
-You might want to sit down and make a plan, with all the fans, duct, lights etc. to make sure everything will fit.
-Obviously the flowering space must be light tight.

Good luck!

__________________
Cultivate a stoic calmness

Learning247

Thanks FG, the guy that's going to start this project is going to be here in 30 minutes, I am going to have each room have it's own breaker for power, and I am going to bust a 4 inch hole out the side of my apartment for exhaust ( landlord said it was okay ) I think I should do another hole for intake but I don't want to push my luck with another hole.

So maybe what I want to do is:

3L x 4W for Veg
6L x 4W for Bud

or

4L x 4W for Veg
5L x 4W for Bud

Thanks,
Learning247

Learning247

Hey everyone,

So, I have been researching this topic for a few hours now and I really can't find the answer maybe someone here can help me.

I am going to have a carbon filter which will exahust all my air outside. My only questions is should I....

Keep the exhaust fan inside the flowering room with the carbon filter and have a duct going out?

or

Keep the carbon filter inside the grow room with the exhaust fan outside the grow room next to the hole that is going outside?

Thanks,
Learning247

farmergiles

In many ways the best set up is to have the carbon filter connected directly to the fan, then ducting going outside. This way (hopefully) all the air exhausted has been through the filter.

If you have a run of ducting between the filter and the fan in the room, then there may be leaks in the ducting or joins allowing unfiltered air in and out the exhaust, stinking up the exterior with dank weed smells.

Edit I like this best. Otherwise your flowering space will never keep up with your veg space. Also you could always use a shelf in the veg space for clones & mamas or something if need be.

__________________
Cultivate a stoic calmness

Learning247

Thanks FG, going to keep the fan & filter inside.