Is this overkill or perfect?

strobie

New Member
Hi all, I'm new to indoor and led. My grow space is a 1.8 feet by 4 feet closet with built in power and ducted filtered air. Ive done a few runs using unconventional LED lighting and a cheap viparspectra blurple p600.

Next week i want to invest in a viparspectra p4000 because its perfectly priced to me, and because its basically the exact dimensions of my grow space give or take an inch on either axis. The shape of this fixture is the same shape and ratio as the floor of my grow space, and the inside of the space is high gloss white paint.

My questions is, given that the fixture is the same shape as my space and pretty much the same size, is this overkill?

I plan on running it at a reduced power level pretty much all the time, as the total Hight is just short of 6 feet. I think having an over spec'd light in my case will actually be good because running it at a lower power setting will reduce heat and also drastically increase the life of the leds.

Before anyone seggests newer models, please not that i picked this fixture in particular due to its size perfectly matching my entire growing area, and because it has a good record and is well build. I'm looking for someone to argue that my logic is bad from their own experience with having lights or arrays of lights that actually perfectly cover a space without any gaps
 

strobie

New Member
No, ventilation is done via ducted climate control system. I am still planning on running a small fan above the light to help move air thru the fixtures heat exchanger, but in theory i don't even need to do that as convection should take case of that, and i already have fans for sub canopy airflow as well as all in one air filters that have fans built in.


thanks for your answer by the way! my only issue now is that I don't own a par meter, so i don't have an easy way of working out what an appropriate light level is. I could use my phone to measure lux and make some guesses i suppose.
 

MedicinalMyA$$

Well-Known Member
This guy tested a P4000 in a 4x4 HERE, I would just use his center peak measurements as your guide seeing as you don't need to worry about coverage. Your own center readings would probably be higher too since you won't have nearly as much losses, maybe 10-20% higher at a guess.

THIS GUY has PAR measured the P2000 so you could probably extrapolate on those readings, he does them at different power levels and heights.
 

Canadain Closet Gardener

Well-Known Member
You will be fine, I have run 800w (a 10 cxb3590) in my 2x4 and am currently running 665w in my 2x4. I always run at full power unless the plants just got out of a cloner.


A post about my 800w light.


My current light build

Cheers
CCG
 
Top