Hi guys a little help needed I am new to growing I have set a grow room up 9 ftx 9ftx6ft and was thinking of haveing 4x 400 mh for grow and then 4x 400 for flowering is this ok .also is co2 worth the investment i have read that dutch growers do not use co2 and prefer to just use a rapid air change what do you guys think.one mor thing 4 lights will this stand out on my lecky bill and land land me in deep trouble...txs

I reckon 4 x 400w = £60-80 per month -

depending on hours per day - (12 or 18?)


double that if you run 8!!!!


Laz

I'd say about £40 per month 12/12.

Have a look here mate.

I wouldn't bother with the added CO2 system, because in reality everything else in your room has to be running bang on for you to notice any benefit.
You need to learn how to walk, before you can run.

Very best of luck,

VRG

thanks guys