70 watt hps or mh

[beginerbuddah]

i have a 70 watt mh and a 70 watt hps
only using one of the lights on a small 1 plant scrog
how much yeild could i expect
i was thinking use the mh for veg
and the hps for flowering
how much ventilation would i need to keep this cool
i was thinking of making a cool tube
just an idea any input apreciated:thumbsup:
:rastasmoke:

beginerbuddah Reviewed by beginerbuddah on 12-30-2007. 70 watt hps or mh i have a 70 watt mh and a 70 watt hps only using one of the lights on a small 1 plant scrog how much yeild could i expect i was thinking use the mh for veg and the hps for flowering how much ventilation would i need to keep this cool i was thinking of making a cool tube just an idea any input apreciated:thumbsup: :rastasmoke: Rating: 5

[GaGrown]

You can make a cool tube from a pyrex round bread loaf ,Wal-Mart. I would use both lights if I could.If you cool the hood or reflector,you'll be good! Make 1 hood for both bulbs. Like a duel reflector.You'll just have 2 ballasts.What is your room size?Multiply length x width x height. That will give you the cubic feet of the room, and you size the fan to how many CF of air you want to exhaust.

Ga Grown!

[beginerbuddah]

thanks GaGrown :thumbsup:
how much air exaust will i need to keep 1 lamp cool?
i was just gonna make a small box like 60cm by 60cm and however tall
its just a little experimant to try my hand at scroging
:rastasmoke:

[GaGrown]

I've never done a scrog in that small of an area. You could use a 95 or a bit larger. The scrog's I've done has been with a fair amount of floor space.That was in the past. Now I have a couple of rooms that are 8x8x5 and 6x6x5. I could work with a scrog in that amount of space.Your experiment can be done,in that space. Just use 2 or 3 plants.

Ga Grown!

[beginerbuddah]

i was only gonna use 1
do u mean 95 cfm?
if so are theese quiet?
:rastasmoke:

[GaGrown]

Now I see I did'nt type CFM..Hmmmmm? I been stoned for 3 days! But,yeah. That was what I meant. 95 cfm.Hydrofarm has 1 and so does Dayton.Hydrofarm has this one.

95 CFM ActiveAir Blower System
SKU: FN95SYS
Suggested Retail: $74.95

4" intake flange. For medium inflation jobs and exhausting air outside.
Exchanges air in a 200 cu. ft. room in 2 minutes.

Flange Type: 4 hole square.
Motor Hp: 1/80 th.
Amperage Draw: 0.5

I got 2-265 and a 465,all 3 are hydrofarm.They are pretty quiet.Inlines are better.

Ga Grown!

[Roughrider]

Gotta be honest..a 70w MH/HPS isn't going to put out that much heat. If you could just leave your door open with any sort of basic fan operating while the light is on during flowering, you'd probably be fine. I definitely wouldn't worry about a cooltube, which is great for the bigger lights/grows like GaGrown is talking about, but probably isn't worth it for a small area.

Andâ??again this is just my opinionâ??you're talking about an area where you'd be better off with CFLs. Because you get better canopy penetration and more efficiency, HPS is better for large areas. But you're talking about .04 of a sq. m. I would consider making your cab a bit largerâ??maybe 30cm x 30cm. A 70w HPS puts out about 5400 lumens, so it's enough for an area of that size. You'd be in the ballpark with 3 26w CFLs as well...and would probably eliminate cooling issues. Just my .02.

[GaGrown]

Roughrider, Cha Ching!:twocents::thumbsup:

Ga Grown!

[beginerbuddah]

cheers guys:thumbsup:
ive got another small box with two little plants in
and i vegged under cfls and ive just put the 70 watt hps in there today
just to see what happens realy i cheked it about an hour after i put it in and the temp was ach felt lower than when i had the cfls in there maybe its jsut cus im baked but ill try it in there for a week or two an post some results once again thanks for the help guys ive learnt so much from this site im sure my plants apreciate u guys they seem very happy now
:rastasmoke: