Would a 400w mh/hps be enough for 4x4 open grow area 10 ak47 autoflowers?

**growthspurt** · 01-19-2010, 03:59 PM

Would a 400w mh/hps be enough for 4x4 open grow area 10 ak47 autoflowers?

Any suggestions accepted. Its in an open room about 14x10 but set to a 4x4 tarp.

**luvvin growin** · 01-19-2010, 04:01 PM

sure,as long as the light is close,dont see any probs.

**growthspurt** · 01-19-2010, 05:04 PM

would a room that is 14x10 have significant heating issues with a 400watt mh/hps? I understand it will get warmer but with the AC at a steady 70 it should be ok or no?

**luvvin growin** · 01-19-2010, 05:07 PM

temps should be just fine,again,provided you have the proper ventilation.Is it a Sunburst complete setup,or a hood and separate ballast?If separate,is it air cooled?If yes,then you will be just fine.

**growthspurt** · 01-19-2010, 05:57 PM

Originally Posted by luvvin growin

temps should be just fine,again,provided you have the proper ventilation.Is it a Sunburst complete setup,or a hood and separate ballast?If separate,is it air cooled?If yes,then you will be just fine.

This is the lights im about to get on friday.

http://www.hydroponicsoutlet.com/Sun...-p/sptm125.htm

do you know any better for around the same price?

Another question would be with that above light do I NEED to aircool it? like will it catch fire or get too hot if i dont?

**growthspurt** · 01-20-2010, 09:25 AM

Does anyone have any ideas on my last posT?

I have more of a question..

this is another link for a 400 watt.. what I find questionable is it shows these specs on the page.... Now 175 watt MH & 150 watt HPS. do both lights run at the same time? Or no? im confused on how the 400 w mh/hps systems work.

**luvvin growin** · 01-20-2010, 09:29 AM

I have the Sunburst 400watt for my smaller plants,and found that it desperately needs to be air cooled,as the ballast and the light that close cause some major heat.I got a 4" flange,mounted it to the light above the ballast,then put that into a 6"to4" reducer to my 6" fan,and the heat was gone.Hope this helps.

**growthspurt** · 01-20-2010, 03:54 PM

Thank you for the info.. I was checking around for other lights and found this deal from HTGsupply. http://www.htgsupply.com/viewproduct...roductID=51374 its a huge combo deal. What do think?

**luvvin growin** · 01-20-2010, 03:57 PM

too much other stuff along with it,but a good light.

**growthspurt** · 01-21-2010, 08:18 PM

I was doing the math on the 400 watt hps covering a 4x4 area and if I divide the total square ft (16) into the 55,000 lumens that the hps provides that means im only getting 3437 lumes per sq ft. I thought you needed atleast 7000 - 10000 for healthy production. Am I wrong?