Need help with Cobs, Heating, AC , etc

REALSTYLES

REALSTYLES

Well-Known Member
MMJ Dreaming 99 said:
Okay. Good info in this thread. I am looking to make some changes for summer. I see the alternatives to HPS heat as:

1. Have glass and vented hoods and a sealed system sucking heat out of the rooms with 8 inch fan and sucking cool air in. Advantages - cooler but still warm and using lots of HPS power. Top of the line is AC/DE setup with vented hoods and DE but SE is probably fine.
2. LEC 315s - two to match a 1000 watt HPS SE. Cooler but how much?? Expensive up front cost. Can it pull 2 to 2.5 lb per light which I can do with 1000 watt HPS hydrofarm cheapies.The costs seems more than QB and LEC bulbs need to be replaced like HPS.
3. COBs - Cooler but how cool. Saves energy over 1000 watt HPS. Higher up front cost. Can it pull 2 to 2.5. Lasts longer than HPS bulbs. More DIY skills needed than QBs??
4. QB Boards by Samsung and Northern Grow Lights. Much cooler than anything else. Uses half the power of HPS factoring cooling costs. More expensive than SE and DE HPS but not too bad. Last long than HPS Bulbs. Can it pull 2 to 2.5 a set up?
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The price I have for Cree = $1.28 per watt when ran @56% efficiency and running organics for the win to lower the cost of growing as well.
 
V

VegasWinner

Well-Known Member
All Watts do not generate heat at the same rates. 1000w HPS creates 605 heat 40% light or there abouts. 1000w LEDs creates 705-80% light and 20% heat dependiong on how hard you drive cobs. Cobs run at 50w or below deliver more usable light for the plants growth than cobs run above 50w. the difference is in the heat generated. Cobs running soft generate less radiant heat and more lumens/watt or joules , whereas cobs run over 50w generate more radiant heat and less lumens/watts or joules. I would go with more cobs at 50w/sf than fewer cobs at 75 or 100w/sf. The later wil will produce more heat and less usable light, and the former will produce more usable light and less heat. I go with 50wpsf every time
 
arcalion

arcalion

Well-Known Member
VegasWinner said:
All Watts do not generate heat at the same rates. 1000w HPS creates 605 heat 40% light or there abouts. 1000w LEDs creates 705-80% light and 20% heat dependiong on how hard you drive cobs. Cobs run at 50w or below deliver more usable light for the plants growth than cobs run above 50w. the difference is in the heat generated. Cobs running soft generate less radiant heat and more lumens/watt or joules , whereas cobs run over 50w generate more radiant heat and less lumens/watts or joules. I would go with more cobs at 50w/sf than fewer cobs at 75 or 100w/sf. The later wil will produce more heat and less usable light, and the former will produce more usable light and less heat. I go with 50wpsf every time
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damn so the vero fixture from timber grow 900w one will generate some heat but nothing compared to my two hps. ill probably still go with them but ill probably dim them to 750w each. and try growing in 6x6
 
MMJ Dreaming 99

MMJ Dreaming 99

Well-Known Member
arcalion said:
damn so the vero fixture from timber grow 900w one will generate some heat but nothing compared to my two hps. ill probably still go with them but ill probably dim them to 750w each. and try growing in 6x6
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Let us know how that Timber rig works and if it will cover 6x6. They have nice stuff.
 
nfhiggs

nfhiggs

Well-Known Member
arcalion said:
how much cheaper would it be for me compare to buying an already made one from Timbergrow 900W vero v7? and how does it cut the power? like completely or does it just dim it down until it hits a certain temperature and stays there steadily?
Also checked out your grow, looking good. are Fabric pots much more amazing then regular pots? i was thinking of switching since i notice my veg takes forever!
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If you want wicked fast veg growth look into doing a Dutch Bucket hydro. Crazy simple to set up and I'm seeing amazing growth rates:

http://imgur.com/IrsM0ik
 
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