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I'm setting up a high power co2 grow. My circuits are being installed rated for a max of 12000w I'm using 110w per sq foot. If I maxed the drivers at 100% it would be 125w per sq foot which would leave me very little room for fans etc. Due to number of cobs etc it worked out easier to get an...

how many watts will go through a dimming lead? Can I use a standard cheap 600 ohm resistor? I plan to wire 16 drivers together to a 600 ohm to limit min power to 10% and then a 5k pot will allow me to drive power up to 90% Where would I wire the 600 ohm resistor in relation to the pot in...

How would you recommend I find a big yielder then? Bare in mind I use RDWC so all genes have shared reservoir so I can't really adapt different nute levels for different plants which is why I thought sticking to nute system would be ideal.

I am looking for a heavy yielder that won't get nute burn easily and can take in all the light I want to provide it. I don't see how a plant can be a big yielder if it burns above 700 ppfd and gets nute burn at 400ppm surely? As it seems the genetics I have in my mother at the moment is...

The reason for hitting them with high nutes and high light and co2 from early on is to cull out the ones that can't handle it. Surely if I keep nute solution weak then I'm not culling any. The one that survives would be my mother? Is this not how some people do it?

Thanks for the input. I will be using feminised seeds so won't need to cull males. I use hydro so they will always be in their final pot size. Do you think I'll end up burning all the seedlings at 1/4 strength?

I could use everyone's opinion on finding the best genes. Here's what I'm thinking of doing let me know if I'm on the right track. I plan on using co2 with 1500 ppfd of light so I plan on starting 40 beans As soon as they get first set or leaves hit them with 1/4 strength nutes and medium...

Bump anyone else got any opinion on this?

Can't Fit those fans on unfortunately. I think I'll have to go for the 220 diameter ones and put big fans blowing across them all

On my install cirt it says 12000w would be ok and up to 20,000 he said however... I didn't tell him 12 hours a day 12 on 12 off as that would be obvious he just knew it was max 12000w

Cheers I appreciate it :) I have no problem calling someone back out and saying I need it rewiring for a server room maybe.. if that helps.. It's hard to know what cover story to give for this haha. On a 230v circuit do you know if a 10mm2 cable is enough to carry 12000w 12 hours a day safely...

Ah right ok you know more than me :) So my RCD won't save any lives anyway?

16 x hlg-600h-36b

Yeah the extract from the manual you just posted went straight over my head

I don't think it's that simple to just increase the ma rating of a rcb as it's at that ma for a reason. If live voltage travels through a human body earth leakage happens at around this range. Say I touch the wire... 32ma occurs and RCD trips saving my life. If I increase the RCD to higher...

How did you check? Do you mean you have 16ma earth leakage

Those heat sinks are 9.50 usd each.. Next size up is 220mm diameter 100mm deep... Will double my cost but if it's needed I will

I'm in the middle of designing my led system and i have just found out a potential problem that will derail the entire thing... I have had a new circuit installed to supply up to 20,000 watts into a new room.. But the main circuit has an RCD rated for 30ma... Problem is each meanwell driver...

I want to work out what size I need for my heat sinks to be running at room temp :/

P well my guy is adamant that his 152mm by 100mm is perfect for 100w