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one thing you didnt mention is how many lights do you want to put in the shed. I ask because you will need a mini split ac and depending on how many lights you have will determine how big you will need.

Honestly I would get the breakers I was talking about and double up a few of those 20a. Then you will have room to add the 2 subpanels balancing the load is easy make sure there is close to equal amount on each side. There is in no order http://timbergrowlights.com/grow-light-kits/...

100a panel you have a little room to expand. I would see if it is possible to upgrade to 200a if not see what breakers can be combined. You can also get the mini double breakers its the size of a regular breaker but you can connect 2 110 loads to it. Move a few breakers around to balance the...

Question 1= better to take a pic and let us see. Question 2= If you run open hoods plan on 6k btu for each hood if you get cool hoods plan on about 3k per hood. You can run co2 either way just seal the room and add a dehumidifier You could look at cob leds and it will help on the power draw...

One thing i did think of was using something like http://www.ebay.com/itm/351671039348?euid=8b37837b74954e80bc3513ffc12b61eb&bu=43200263410&cp=1&sojTags=bu=bu connect it to a water source and if you know exactly how much water you want for a feeding you can set the liters to be dispensed. All...

If you want to do 6 per 4x4 you can bump up the power to 2.1a here is the numbers for that Citizen.1818C4.3000K 6 COBS @2.1A ON 5.88 PROFILE HEATSINK 16 SQ.FT. CANOPY 93% EFFICIENT DRIVER @10 CENTS PER KWH Total power watts at the wall: 731.18 Cobs power watts: 680 Total voltage...

Ok i am with you 8 cobs per 4x4 here is the cree info on what I suggested Citizen.1818C4.3000K 8 COBS @1.4A ON 5.88 PROFILE HEATSINK 16 SQ.FT. CANOPY 93% EFFICIENT DRIVER @10 CENTS PER KWH Total power watts at the wall: 625.81 Cobs power watts: 582 Total voltage forward: 416...

The cobs and drivers will be more than $1000 I would suggest to use citizen 1818 or Luminus cxm 22 you can get the cobs about $20 each. 8 cobs per 4x4 and then to drive them I suggest elg-150-54-d2 2 cobs per driver so you would be running them at 1.4a. Unless you want to dim each light...

I am Diy cob led I will replace 4k hps with 6k cobs i should average 1.0-1.2 gpw right now with hps i will get .6-.75 so an increase of yield and less electric over 30a difference less ac needed it doesnt take long to get your money back. You can replace a 4'x4' area of cob led for less than...

I run perpetual so i harvest 24 a month and I will get 3-4 lbs for 24 plants depending on the strain I know what you mean about the electricity bill one reason I am switching to cob leds. Right now I have to have 70a just to turn the lights on and after the leds are up the flower room and veg...

My flower room is the same size and I run 48 plants scrogged in 3 gallon smart pots in coco top feed. I am switching from hps to cob leds. The mini split that is in the room is 24k I only ran 4k of hps lighting open hoods on light rails. It was cheaper to get the light rails than get a 48k mini...

There are cobs that will put out 17000 to almost 20000 lumen each. That is why there is not one cob that is the best for everyone. It depends on your grow and situation the reasons you are growing. For me going from 4k hps room to cob leds made sense for several different reasons. When the...

ppfd is not just power its ppf and other variables each cob will output only so much how hard you drive them helps....... yes you get better efficiency running them softer but then you are adding more cobs to make up the difference. There has to be a point where it is costing you more than it is...

like to run flower about 800-1000 ppfd

A little better than the citizen 1818

I didnt look at the spec sheet I cheated and used the cob calculator and copied the info over.

He is using arduino not a pi look at the title

And the results or a link to the thread?

I'm thinking of doing a shootout 2k hps vs 1500 watts of cobs

My veg room is 13'x7' not all of it is used for veg but it has 3 600 watt mh eye hortilux and the flower room is 13'x16' with 4 1000 watt eye hortilux on light rails with dominator xxxl hoods. It will all be coming down soon and the leds are going up.