COB spacing in a 50x90cm closet?

calliandra

calliandra

Well-Known Member
Hi folks!

so I'm all ready to get my modular COB LED lighting going, but am a bit unsure about the spacing in my closet to get well distributed light.

I've got 4 solo sets of Growmau5' passive cooled Cree Cobs (with CXB3590 3500°K 36v CD bin) which will be run on a 50W driver each.

The closet dimensions are 90cm wide, 50cm deep and max height for the lights is 140cm (closet total 187cm).
That's 35" wide, 20" deep, light space 55", closet height 74".

I'll always be growing either 1 big plant (scrogged) or 2 smaller ones (possibly with different heights) next to each other in there.

This is the way I was thinking of placing them:
newLED_plan.jpg
When I draw 30cm diameter circles around the COBs, I get 2 corners of the closet which are outside that range. Also, not sure about "hotspots" along the middle - I tried to imagine them by drawing 15cm diameter circles...

Does this look sane to the light-savvy eye or am I launching into tear-filled disaster with this?
Thanks tons for your thoughts! :mrgreen:
 
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calliandra said:
Hi folks!

so I'm all ready to get my modular COB LED lighting going, but am a bit unsure about the spacing in my closet to get well distributed light.

I've got 4 solo sets of Growmau5' passive cooled Cree Cobs (with CXB3590 3500°K 36v CD bin) which will be run on a 50W driver each.

The closet dimensions are 90cm wide, 50cm deep and max height for the lights is 140cm (closet total 187cm).
That's 35" wide, 20" deep, light space 55", closet height 74".

I'll always be growing either 1 big plant (scrogged) or 2 smaller ones (possibly with different heights) next to each other in there.

This is the way I was thinking of placing them:
View attachment 3752320
When I draw 30cm diameter circles around the COBs, I get 2 corners of the closet which are outside that range. Also, not sure about "hotspots" along the middle - I tried to imagine them by drawing 15cm diameter circles...

Does this look sane to the light-savvy eye or am I launching into tear-filled disaster with this?
Thanks tons for your thoughts! :mrgreen:
Click to expand...
i would add 2 more COBS & go with this spacing
x---x---x
x---x---x
:peace:VG:eyesmoke:
 
calliandra said:
So you're telling me that 200W of these lights still isn't enough? :roll: for clarity:dimensions are a bit under 2' x 3' :shock:
Click to expand...
200w is on the lower end of the scale but to cover those dead spots & get max yeild go with 6 COB's.
Depends on how much yeild u want, 4 COBs should be ok tho.
:peace:VG:eyesmoke:
 
verticalgrow said:
200w is on the lower end of the scale but to cover those dead spots & get max yeild go with 6 COB's.
Depends on how much yeild u want, 4 COBs should be ok tho.
:peace:VG:eyesmoke:
Click to expand...
well yeah, I'm kind of at my budgetary limit with 4 (for now).
I've actually built the first half now and with the ledil reflectors on, yes I get a dark corner :/
 
calliandra said:
well yeah, I'm kind of at my budgetary limit with 4.
I've actually built the first half now and with the ledil reflectors on, yes I get a dark corner :/
Click to expand...

Did u build a frame with aluminium angle for COB light?
The above Layout is very good so maybe just rotate plants daily if u can.
:peace:VG:eyesmoke:
 
verticalgrow said:
Did u build a frame with aluminium angle for COB light?
The above Layout is very good so maybe just rotate plants daily if u can.
:peace:VG:eyesmoke:
Click to expand...
Ah yes, I can turn the plants as long as I'm not scrogging :mrgreen:

My construction is really crazy, er, experimental. lol
Each Cob is in a little aluminium angle "tray" along with its driver so I could hang it singly, and then 2 sets are attached to a small wood frame to ensure the proper spacing.
Here's a quick pic - I haven't cut or tucked the wires yet as I'm not sure I want to keep them this way ;)
P1020767.JPG
Maybe I should just take off all that plastic shit and let the COBs shine all around...?
 
calliandra said:
Ah yes, I can turn the plants as long as I'm not scrogging :mrgreen:

My construction is really crazy, er, experimental. lol
Each Cob is in a little aluminium angle "tray" along with its driver so I could hang it singly, and then 2 sets are attached to a small wood frame to ensure the proper spacing.
Here's a quick pic - I haven't cut or tucked the wires yet as I'm not sure I want to keep them this way ;)
View attachment 3755445
Maybe I should just take off all that plastic shit and let the COBs shine all around...?
Click to expand...
Thats actually a good idea, take off & keep the reflectors for a rainy day.
Nice light & thx for the pic of ur light.
:peace:VG:eyesmoke:
 
Since you will have some light reflection off the nearby walls, do not worry too much about spacing. Since light keeps traveling forward until it gets reflected off of something, those "Dead spaces" will be filled with light,

I am growing in a small space (53 cm x 53cm x 1.63m) also. In pursuit of maximizing your grow space... Unless your closet is matte white that is not textured at all, better reflective material in your grow space is next.
 
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