too much light??

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too much light??

Postby a_sukasame » Tue Sep 29, 2009 12:02 am

an 8 x 4 tent with 2 1000watts too much??
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too much light??

Postby stoned sam » Tue Sep 29, 2009 12:26 am

with sufficient venting it shouldn't be a problem
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too much light??

Postby yelodrvr » Tue Sep 29, 2009 3:14 am

to be honest there is information missing here. we need to know what ventilation you have.

depends on how much money you have. there is some cool shit out there that use a chiller. water chilled cool tubes being just 1. the ice box claims to eliminate most of the heat from a 1000w when attached to a chiller. i dont think AC alone would do it.

what about 1x 1000w with a light rail? the price of a light rail cant be as much as a 1000w ballast and buld.

if you cheap out on the ventilation like I did, let me tell you its a bitch. I wish I had went with 600w or 2x 400w. I am in a 12L x 5W x7H with 1x 1000w and no real ventilation.
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too much light??

Postby a_sukasame » Tue Sep 29, 2009 4:47 am

Thanks for all inputs...but would it be worth it 2 have to 1000s?? or 1 would be enough??..The tent is 8feet x 4ft x 7ft. For vent I have a 400cfm exhaust with a odor soker attached.
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too much light??

Postby Aerogrower » Tue Sep 29, 2009 5:36 am

Well with a lens and air cooling I would still say only 1. How many plants are you trying to fit? Even if you could cool it the added cost would outweigh the benefits to the yield I would think.
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too much light??

Postby OHIOCHRONIC » Tue Sep 29, 2009 4:55 pm

It could easily be done with 3 inline fans and a portable a/c unit. 1 fan for each hood and 1 for the scrubber. But as ferengi said heat is really your only problem with this setup. your yield would be fucking massive i beleive as long as you could keep your temps under 82 - 83 :D
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too much light??

Postby Mr.DANK » Tue Sep 29, 2009 10:06 pm

My old room was an 8 foot by 4 foot room where i used 1-1000 watt and 2-600 watt HPS lights. I used the enclosed ventable shades and my grow room was easy to keep at the proper temperature. As long as you have proper ventilation you will be fine.
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too much light??

Postby a_sukasame » Tue Sep 29, 2009 10:41 pm

What about 1 1000 with a light rail??
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Postby fatman7574 » Sun Oct 04, 2009 9:04 am

Approximatelly 85 percent of a HID lights is in wavelengths providing heat. So (2000 * 0.85) = 1700 watts of heat. (1700 watts * 3.41) = 5797 watts. A typical air conditioner provides 1200 btu of cooling per hp. That means it would require a 1/2 hp chiller or air conditioner to remove the heat added by two 1000 watt lights. Simply put, it would require the use of a $150 (Sears Kenmore) 6000 btu air conditioner that uses approximatlly 600 watts to remove the heat. A 6000 btu chiller (1/2 hp) would cost a great deal more at approximattely $800. Plus a chiller in this price range would exhaust the heat it removed into what ever room/space in which it occupies. If using a cheap window air conditioner the heat would be exhausted out side but no odor would be exhausted. However that would require your grow area to be located with a window available. There are double hose portable units avialble but they are about 3 to 4 times as exopensive as a window unit. This means to grow at temps up to 70 to 75 degrees you would also need to provide fresh air intake constantly (when lights are on) to insure adequate CO2. Even with a chiller or air conditioner you would be limited to temps that are proportional to the amount of CO2 available. Ambient levels of CO2 are quite low at less than 400 ppm. At temps of 75 to 80 degrees for maximum growth you need 1200 to 1500 ppm. For good growth in the 80 to 90 degree range you need 1500 to 2000 ppm. Or you would need CO2 isupplementation to utilize higher temps of say 80 to 85 or even 90 degrees if you system is aeroponic or hydroponic. That much lighting is essentailly more lighting than waht can be reallly used without CO2 supplementation. even with cos nstant air flow it is a waste of lighting as not enough CO2 is available for optimum usage of that amount of lighting. Plus with soil grows it takes a lrage pot to provide for the large root system needed to supply the water and nutrients need to utilize that much light. CO2 supplementation allow the use of high wattage lighting without haing to pay to remove all the heat the lights produce. However, even with CO2 supplementa\ion the temps stiil usually require some heat removal. As mentioned by another replier water cooled lights are an option as they removed about 75% of the heat from the lights to a resrvoir of water but you still need to remove the heat from the water. This requires a very large reservoir or a chiller used to cool the water in a smaller reservoir. If you have well water from a shallow well then that water would provide a cheap cooling sourse but you would be using and discarding the water. However your only going to need a 1/4" water line at about 35 psi to carry away the heat from 2000 watts of lighting so the cost is not highh. Some aeroponic and ht ydroponic growers use the water for cooling to supply the water to there RODI filters. You get double use of the water and a RO filter works more efficiently with warmer water that the usual tap water temperature used. As long as you can use thatt much RO water you are money ahead of using a chiller or air conditioner.

Too much info?
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