Need help new grow set up

**huey14** · 11-26-2010, 05:02 PM

So i got my 1000 watt system ready to go but the problem i am have is that every one keeps telling i cant grow a 3 foot indica with a 1000 watt light in a 3x4 because it will get to hot so i was wonder can i pull this set up off with a cooled hood 6 inline 450 cfm and the space i have any info would be help a lot

**Serapis** · 11-26-2010, 05:05 PM

The light is too big for that cabinet. A 400w with inline cooling may be able to get within 12" of plant tops, but not a 1kw. That needs about 2' of clearance with good ventillation.

**420God** · 11-26-2010, 05:13 PM

You would need a cool tube like this in that small of a space.

Fresh air moving over the light so quick should keep it cool enough.

**Serapis** · 11-26-2010, 05:25 PM

Originally Posted by 420God

You would need a cool tube like this in that small of a space.

Fresh air moving over the light so quick should keep it cool enough.

The radiant transfer from the bulb to the reflector and glass tube will create a lot of heat with a 1000w bulb, regardless of airflow. You still won't get it that close to plants without burning them. A water cooled 1000w would.... but that is another story. He has only 4' in total height to work with. That includes container height and air space above and depth of hood. By the time his plants reach 2' tall, the tops are touching the bulb.

**420God** · 11-26-2010, 05:31 PM

Originally Posted by Serapis

The radiant transfer from the bulb to the reflector and glass tube will create a lot of heat with a 1000w bulb, regardless of airflow. You still won't get it that close to plants without burning them. A water cooled 1000w would.... but that is another story. He has only 4' in total height to work with. That includes container height and air space above and depth of hood. By the time his plants reach 2' tall, the tops are touching the bulb.

You're mistaken, with a cool tube like that he can pull fresh air in from outside of the grow area cooling the light allowing him to get it with-in inches of the top.

**420God** · 11-26-2010, 05:55 PM

Although I will admit that would be too much light and you would definitely bleach the plant being that close.

**Serapis** · 11-26-2010, 06:03 PM

I personally would not place a 1000k watt within inches of my tops regardless of how much air was moving through that cool tube. The radiant heat alone will kill the tops. The bleaching will destroy chlorphyll. I'll bet money that it can't be done successfully as we are discussing it. I keep my 600 watt AIR COOLED hood 2' above my canopy. The ambient temp of my tent is 79 and the top of my scrog is 85. That is with a 600 watt inline air cooled hood with an extractor fan at 240cfm. I'm in a 7' high tent, imagine the heat in a 3x4 box?