250w HPS Club And Help Guide
- Thread starter Wretched420
- Start date
Yeah, i was checkin that one out too. Looks like a good deal, the only problem i see is the spectrum of both bulbs arent the best. Theyre just standard mh/hps bulbs. But thats the case with alot of the 250watt packages that are inexpensive on ebay. LMk how it works out for you though. Cause im seriously torn between this one and some other system on ebay.
ALso, can anyone give me a general idea if what i posted early would be enough to cool a 250watter.
thnx
Nitegazer
Well-Known Member
I'm not clear on your setup--- is the box fan just set on the floor outside the partially close door? Is the fan at the top of the closet vented? Most 12" fans would be fine for a 200 sq.ft. space, IF there is unrestricted airflow. The fan at the top of the closet (exhaust) is also the critical fan-- what is the CFM on it?
Actually im looking at the fans and they are 20 inch box fans. This is the exact fan type. (http://www.homedepot.com/Lighting-F...splay?langId=-1&storeId=10051&catalogId=10053)
I cant find the cfm on the box or the product description. But yes, I will have one of these fans on the ground blowing into the closet and second one mounted on the back wall of the closet blowing air out. The fan will be mounted at a height so that it is blowing the air out of the top of the closet opening.
Was also thinking of putting a third fan inside the actual closet to blow on the light/plants.
I cant find the cfm on the box or the product description. But yes, I will have one of these fans on the ground blowing into the closet and second one mounted on the back wall of the closet blowing air out. The fan will be mounted at a height so that it is blowing the air out of the top of the closet opening.
Was also thinking of putting a third fan inside the actual closet to blow on the light/plants.
Nitegazer
Well-Known Member
As long as your temps are holding below 80 degrees, you probably are fine on the air circulation front. If you temps are getting up higher, I would recommend you spend a bit more time/$$ on ventilation. Consider venting the hood or use a bathroom ventilation van to keep the air moving. With a better setup, you'll be able to have the door closed and can keep the grow more private--- of course, you may have to cut a hole in the wall...
yeah, i want to try and get acouple of grows done with this setup. After i have my technique down, i plan an making a small cab and buying the 4in inline/scrubber combo from htg. If my temp in the closet without the fans or light is 75 degree at the hottest point of the day. a 250 watt hps and the fans should be ok, right?
thanks for your help man. appreciate it.
thanks for your help man. appreciate it.
Nitegazer
Well-Known Member
75 degrees with the lights off will easily get you above 80 degrees when the lights are on-- bad for the plants. To keep the temps as close as possible to ambient, you will need to vent the reflector hood. Here is a fairly cheap air cooled reflector I found recently for $80 plus delivery:
http://www.hydroponics.net/i/131506
Another option is the 'cool tube' at HID Hut
I'm have the exact same issue and came to grips with that if I am going to use HPS, I need to be liberal with my ventilation. I have a 130cfm squirrel fan with a carbon filter now, and will add a second 100 cfm fan for the reflector that will go directly out of the cab.
Since the air for the reflector does not mix with the air in the cabinet, I have the bonus option of adding C02. That way I can have temps near 90 if necessary-- and more growth!
http://www.hydroponics.net/i/131506
Another option is the 'cool tube' at HID Hut
I'm have the exact same issue and came to grips with that if I am going to use HPS, I need to be liberal with my ventilation. I have a 130cfm squirrel fan with a carbon filter now, and will add a second 100 cfm fan for the reflector that will go directly out of the cab.
Since the air for the reflector does not mix with the air in the cabinet, I have the bonus option of adding C02. That way I can have temps near 90 if necessary-- and more growth!
hempstead
Well-Known Member
I had 4 plants in different stages going in 1 gallon pots and yielded about an ounce per plant.
snwbrder03
Member
Great thread i have a 250 MH and 250 HPS, my closet is fine for temperture on the HPS but on the MH i have no ventalation so i have to keep the doors open(in a Shed thats not what i was wanting to do) and i was wondering, what are ways and what was have you guys done to keep the temperture down?
ptone
Well-Known Member
Thanks +rep anyone else got some input for me?
businessmen
Active Member
Definetly train them for many tops, even in height! Or do like 15 one gal pots with one top.
pitbull1117
Well-Known Member
I have a quick question. I have a sterilite 2 shelf box that I just bought. The 250 fits in there perfectly. I just bought 2 106cfm muffin fans for like 50$ a piece. Well the question is, do I stick the exaust one that on the top on the inside of the box to get better results? Because it's on the outside and it still feels a little warm. And then the other question is do I put the fan that's intaking the air on the outside of the box? Wouldn't this be better? I'm thinkin it will but I don't really know.
businessmen
Active Member
Yeah on the outside probably better. But it also might work better to have two exhaust and two passive intakes, aka holes at least as big as the exhaust holes or bigger. Get a thermometer. I just use one exhaust and a passive intake, and have an extra fan as backup in case it fails.
Nitegazer
Well-Known Member
I grow three or four plants in a 4sq.ft. cabinet in three gallon containers. I go with SCROG to maximize the light. I haven't weighted the product (personal use only, and am paranoid about scales), but I can tell you that the cab gets filled and the plants are happy. Check out the latest photo in my journal (see sig below) if you want.
pitbull1117
Well-Known Member
Thanks buisnessmen my temps are around 78-80 degrees. Is that fine? The top of the plant is 9 inches from the light is that also fine? This is my 3rd grow but still learning the techniques oh and does Mylar make a significant differance? I'm growing in a area of no more then 9 sq ft with Mylar and these fans is that a strait setup for 2-3 plants. Ok I'm done this is all in Need to know to achieve my 3rd grow thanks 250 users
businessmen
Active Member
Is it 9 cubic ft? 9 sq ft is lick 3x3 ft area. Youd want a 400 watt lamp. 9 inches is ok, I get it closer, like 2-6 inches. In a 3x3 area you would need it higher to get the lamp's footprint to reach everywhere. Mylar is great, I just have flat white paint cus Im cheap.
pitbull1117
Well-Known Member
mylar is cheap to.
