Lumens Per Squarefeet

[Mr. Ganja]

your question is vague... Even though you have been answered...Did you get the answer you were looking for?
What are you asking? do you want to know the minimum lumens per sf necessary to grow under?
Or, Do you want to know how many lumens to equal the sun's Output?
what rule of thumb are you asking about?

Glad to help, but didn't know what to tell you. lw:smokin:

Well, I meant how many lumens per square feet would be needed to produce some good bud that I'd be able to smoke and do other things with.
I think I'll be well short of matching the sun's output, I'll aim for half of that amount and try to develop the top colas.

[Mr. Ganja]

My flower closet/room will be 8'x4'x8', and my veg is going to be 4'x4'x8' high. I plan on having a clone cabinet also. Will you be using hydro or soil? I am hoping I can fit a 24 pot (http://www.hydroponics.net/items/details/multiflow.asp) << this one in my flower room/closet. If I cant get all 24 in, I am figuring I can run at least 18. Pots are only 9 inches in diameter, so it'll be close. I guess I'll go with Super Sun 2 1000 watt HPS (2 of them in flower cabinet). That will give me around 8100 lumens per sq.ft. I figure with 18 pots I can get at least a pound per harvest. Space is not an issue with me, I live alone in a 14 room house, but I am going to use a spare bedroom I can close and LOCK the door on.




good luck when you get started,
b0nger

Thanks.
I'm gonna go hydro. I like the DWC system, everyone here seems to get good results with it.
Space wont be an issue with me either, I'll have the basement to myself. Which could be mean 2 to 3 rooms and a large closet.
A pound per harvest would be ideal, that's 5 grand in the bag right there.:stoned:

[turtle420]

Interesting read, this thread....

I wanted to comment something:
In my grow cabinet, I have one 400W MH, and one 600W HPS.
So... let's say we've got 35,000 lumens in the MH... and, say, 90,000 lumens in the HPS... (figures are "conservative", I would think).

The eternal question::: Can these lumens be added?
If not, I would be having with the HPS
90,000 lumens / 5.55sq.ft. = 16,216 lumens/sq.ft.

With the MH only
35,000 lumens / 5.55sq.ft. = 6,306 lumens/sq.ft.

(cabinet dimensions: 20"x40" = 800sq.in./144 = 5.55 sq.ft. )

Ideas?