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have a look at the citizen 1818 or luminus 22 both of the cobs are cheaper and they are more efficient over 50w

Just have the carbon filter sitting on the floor scrubbing the room dont vent it otherwise you are venting heated air

I would suggest putting a pump on a timer and this pump they are less than $35

It is best to upgrade the wire to 6/4 and a 50A breaker then you can run the 8 ballasts with a lighting controller. http://www.titancontrols.net/shop/bybrand/TITAN/titan-controls-helios-7-8-light-240v-controller-with-timer_1 Or build one yourself but still have to upgrade the wire and breaker...

With the 1050a driver your running them at 500ma each with the 2100ma you are running them at 1A each that is 2 boards per driver the fan in the room for the plants will be good to help cool the heat sink. The 3000k is fine for veg and flower

Depends on how hard they are driven I would stick with 4QB and 2 slate 2 heat sinks 2 divers @2.1A that is about $600 for a 4x4 light

The price difference between qb and cobs depends on the exact cob family you want to use. Im not going to work out the price differences for you but a few suggestions on cobs are all for a 4x4 all @1.4A 12 citizen 1212 = 8 citizen 1818 or 8 Luminus cxm22 = 12 vero 29 or 4QB 2 hlg-240-2100 divers

Hes not buying from cdi he is buying from citizen and I could also if i wanted to buy 300 cobs at once. Yes the company doesnt like to sell to growers but the sales rep for the eastern coast doesnt care I wasnt about to buy 300 cobs 48 for me and try to get rid of the rest.

He is using the 240w driver not 120w

The hlg-240h-c1050 can run 4 boards each board will have 250ma Personally I would stay with the 240 driver and double the amps

First question is what is the budget? Second question is what is the height of your area? Cobs are good and qb are better if you are restricted by height.

YES they do. I know a few people that have had canceled orders and refuse to sell to them because they grow or known growers. I had ordered 48 1818 and 20 drivers and the sales rep made a mistake on the model ordered A drivers and not D2 I told them I will refuse to pay for that mistake was...

Cancel your pending orders

If you are looking to go with leds better to go with cobs lighting a lot better than mars or cfl. To many people hacking the mars and putting cobs in them. If you are not a diy person here are 2 companies that come to mind that have prebuilt lights. http://timbergrowlights.com/...

I cant say for the UK but in the US talk to the bank and start a dispute with the company.

Are you running 660 nm and 730? or just the 730?

If you want to run perpetual use the 4x4 for veg and get a 4x8 for flower 8 week strains are the easiest. veg the 4x4 for 2-3 weeks then cut clones week 4 put veg plants into flower only fill half the 4x8 tent. The clones go into veg. 2-3 weeks cut clones again week 4 move to flower the...

It depends on the kit you are looking at here is an example http://timbergrowlights.com/400-watt-vero29-v7-4-cob-grow-light-kit/ No frame http://timbergrowlights.com/400-watt-vero29-v7-square-framework/ Frame included Personally I dont use vero but there are a lot that do. If I were...

A few people have wanted to talk about meanwell software dimming. http://www.meanwell.co/assets/data/SDP-001.pdf If you have specific questions ask them here and if I have made a mistake please speak up. I will upload pics of my setup once it is complete, but we can talk about it for now...

here you go CXB3590CD36V3500K 18 COBS @1.4A ON 5.88 PROFILE HEATSINK 32 SQ.FT. CANOPY 93% EFFICIENT DRIVER @10 CENTS PER KWH Total power watts at the wall: 945.16 Cobs power watts: 879 Total voltage forward: 628 Total lumens: 160453 Total PAR watts assuming 10% loss: 446...