Can I run a 400W MH/HPS in a cool tube without raising temperature a lot - Cannabis Cultivation

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gorlax
Stranger

Registered: 10/30/11
Posts: 79
Last seen: 2 years, 8 months

Can I run a 400W MH/HPS in a cool tube without raising temperature a lot

#634094 - 08/07/12 01:26 AM (12 years, 4 months ago)

Prelude:
my box dimensions 1.6ft x 3.3ft x 4.2ft
170-190 CFM inline exhaust
speed bully fan controller at half power ambient temp is 80-83
.. i live in a desert its scorching fucking hot right now. I even have my A/C at 78F!!! my room just happens to face the sun!

but at the local hydro shop I was looking at cooling hoods and the employee told me as long as I have a cool tube setup I really don't have to worry about the heat from the bulb. I was going to go with 150w. but that just seems dumb considering I have that in CFL's being used now. I touched the hood and it was cool to the touch so he wasn't bullshitting me but then again i don't know what CFM fan that display was hooked up to!

I have a 170 CFM inline exhaust with scrubber that I plan to soon hook up my bake a round pyrex cool tube too. but I'm totally stuck on what wattage to go with!!!??!?!

250

or 400???

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brainsOplenty
ganja farmer

Registered: 05/14/11
Posts: 769
Loc: zion

Re: Can I run a 400W MH/HPS in a cool tube without raising temperature a lot

[Re: gorlax]
#634145 - 08/07/12 06:31 PM (12 years, 4 months ago)

you would probably be good with a 400.
i have a 600 in a cool; tube, and i can feel some heat coming off of it.
a bigger air cooled hood would probably suit a bigger bulb better.
but for 400 you should be fine.

--------------------
it's written right here.
it's absolutely clear.
the ganja herb is the healing of the nation.

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gorlax
Stranger

Registered: 10/30/11
Posts: 79
Last seen: 2 years, 8 months

Re: Can I run a 400W MH/HPS in a cool tube without raising temperature a lot

[Re: brainsOplenty]
#634163 - 08/07/12 10:42 PM (12 years, 4 months ago)

Cool! What kind of exhaust you using?

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brainsOplenty
ganja farmer

Registered: 05/14/11
Posts: 769
Loc: zion

Re: Can I run a 400W MH/HPS in a cool tube without raising temperature a lot

[Re: gorlax]
#634254 - 08/08/12 08:02 PM (12 years, 4 months ago)

i'm running a 6 inch inline fan at 450 cfm.
in a 3.6ftx3.6ftx6 ft closet.

--------------------
it's written right here.
it's absolutely clear.
the ganja herb is the healing of the nation.

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gorlax
Stranger

Registered: 10/30/11
Posts: 79
Last seen: 2 years, 8 months

Re: Can I run a 400W MH/HPS in a cool tube without raising temperature a lot

[Re: brainsOplenty]
#634263 - 08/08/12 10:18 PM (12 years, 4 months ago)

Damn Yah Ima play it safe and just go with 250w

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