Questions about HPS and tent...

[GetThisOrDie]

Sup guys...

Ive been using CFLs and LEDs and am curious to try an HPS for flowering.

My tent dimensions are 31 1/2" x 31 1/2" x 63" tall. My biggest concern is heat compared to LED/CFL. I know it will get much hotter but I plan on using a cool tube or vented hood. Homebox (maker of my tent) says my tent should use a 250w HPS.


Here are my questions:

1) Which cools better? Tube or vented hood?
2)Should I use the 250hps or can I step up to a 400w with the size of the tent?
3)Would a 250w HPS produce better buds than a 90w UFO LED?
4)What size of fan should I use to cool the HPS? I have a 4" inline booster fan that I would like to use. Would it be effective enough?


I appreciate all feedback! Thanks.

GetThisOrDie Reviewed by GetThisOrDie on 12-13-2009. Questions about HPS and tent... Sup guys... Ive been using CFLs and LEDs and am curious to try an HPS for flowering. My tent dimensions are 31 1/2" x 31 1/2" x 63" tall. My biggest concern is heat compared to LED/CFL. I know it will get much hotter but I plan on using a cool tube or vented hood. Homebox (maker of my tent) says my tent should use a 250w HPS. Here are my questions: 1) Which cools better? Tube or vented hood? Rating: 5

[EvilCartman]

My tent dimensions are 31 1/2" x 31 1/2" x 63" tall. My biggest concern is heat compared to LED/CFL.
Here are my questions:


2)Should I use the 250hps or can I step up to a 400w with the size of the tent?

I run a similar tent, same size. IMO, as long as it's air cooled, a 600W would be the hot set-up. I run a 400 and think a 250 would disappoint in that space. :twocents:

[GetThisOrDie]

Thanks for the reply!

I like to see your posts because your avatar is so crazy lookin...

Anyways. How are the temps in your tent using the 400w? Is it aircooled and what type of fan do you use?

I have been looking at 250w 400w and 600w hps setups. For some reason the 250w is way more expensive than the others...

[EvilCartman]

How are the temps in your tent using the 400w? Is it aircooled and what type of fan do you use?

Temps running ~75F with an ambient room temp of ~70.

Reflector is a Sunspot 6, yes, air-cooled. My fan is a 6" Wind Tunnel, also using a speed controller on it. I only run the fan at about 50%. It's more fan than needed, but throttling it down keeps it much quieter than a 4" at full-bore.

I'm running into an issue in my current grow with regard to plant height. A cool-tube gives a little more headroom in a smaller tent. My reflector is nice, puts down a nice pattern, but it eats up a lot of room at the top of a tent.