Hey there Nah I don't thinks this is too much, in fact the more cobs you have the better light spread you have, so yeah I'd advice you keeping the Cobs at 50/70W , any higher wattage would be overkill with the 9 cobs you're going to display. Trust me 9*50W is really going to do magic already. nice ...

Well I can't tell you about mixing COBS because I would say there is enough blue in the 3000 / 3500 K already but this is only my dime. If I were to use 4000K I would use only 4000K for veg and then switch to the 3000's and 3500's. I myself mixed spectrums with 2* 3000K cri 90 and 1* 3500k cri 90 i...

so you think 9 cobs in x 6x2 is too much ?
i could always drive the b version at 700mha or 1050 mha and get 50 w / 70 w and much higher efficiency

im really trying to get the one light does all

ok thanku ill bear it in mind

My space is 6ft x 2ft

I’m having custom made heat sinks there 190 mm x 150 mm and 50mm high they should cool between 70-100w I’ll also have a 6” in-line fan blowing directly across the top I was going to run the hlg 320 x 2 or I wanted to do a mix of cobs to give a better spectrum of light which is why I was going to use...

Got heat sinks for each cob and driving them with 1400mha but not sure which version of the vero 29 is best model b c or d !
I’ll be running hlg 320s x 3 for the 3 different kelvin of the cobs with potentiometers on each driver so I can mix the light