Lumens Per Squarefeet

[Mr. Ganja]

I will aim for around 4,000-5,000 in my planned flower room. Thanks.

[Swizzy89304]

Will be excellent for a first grow. Ive got 7,000 lumens per square foot from a 250w HPS, and I would still use the 600w HPS but the heat that it generates just isnt funny. In the winter it would be fine, but my room would be bloody freezing because Id have to leave the window open. Get a few sheets of mylar aswell if you can, its dirt cheap if you shop around and worth every penny/cent.

[Mr. Ganja]

Will be excellent for a first grow. Ive got 7,000 lumens per square foot from a 250w HPS, and I would still use the 600w HPS but the heat that it generates just isnt funny. In the winter it would be fine, but my room would be bloody freezing because Id have to leave the window open. Get a few sheets of mylar aswell if you can, its dirt cheap if you shop around and worth every penny/cent.

Well, I wont be growing right now, but I'll be getting a house in about a year. Right now I'm just doing my homework and making blueprints. And I've got some money saved up solely for growing. I'm gonna devote a basement room to growing. A 10 x 10 x 8 should be good. I'll make partitions with wood, so I'll have a flower room, which I'm aiming to be around 25 square feet. The Veg room will be slightly smaller.

[bongerstonerd00d]

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

[latewood]

What's a good rule of thumb for lumens per square feet?

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:

[LIP]

My grow room is no where near my bedroom, but the lighting in there is SO hot it basically warms my whole house.. I havnt used the heating in ages.

[bongerstonerd00d]

Got my answer bro. I figure if I use the 2 1000 watt lights I will have enuf lumens per sq. ft. (32 sq. ft.)

Lip, I am going to be venting my heat outside bud, I have existing duct work that comes from basement I use to vent furnace with. I can easily tie into that with little problem. Will actually make furnace vent better because it will cause a draw since I am blowing the exhaust into it. Will check for outside noise, and if needed, I can add mufflers on the fans. But I am figuring (and this fucks me most of the time) but due to the length of the run, and I am going to use insulated duct, I should not have a noise problem.


b0nger

[latewood]

I have done a great deal of reading, and I have yet to see where it was suggested that you have 10,000 lumens per sq. ft. That would mean to have optimal growing conditions you would need 1000 watt HPS in a grow cabinet that measures 4 x 3.5 feet, roughly. Damn, how the hell would you keep that cool? If 10K per sq. ft. is the number, then all the hydroponic sites are dead wrong on their suggested coverage area per light, and advertising falsely. I wish some of the other experienced growers would shed some further "ight" on this (no pun intended).

I am just a noob idiot, but I love to read.

peace all,
b0nger

the hydro lighting co's are telling you the maximum coverage area for a particular light with a reflector
250w...2x3
400w...4x4
600w...6x6
1000w...8x8, they are not telling you that you are equaling the footcandles per sf. that the SUN puts out.

gotta go...will check back later. lw

[Krogith]

i don;t know how anyone would grow with out venting it dude =) the cooler it is the more nutrishion your babys eat :smokin: the hotter the more water they go throu:smokin: Lip my be heating his house but his babys i bet could use more Co2 than Stale air:smokin:

[latewood]

Hellllll yeah...2-1000's...I like Zandor's answer...

If you want a real good lighting read. Aside from the good
info here @CDOT...then go to Weedfarmerdot.

I have 2 1000's in my flower room now 1mh agrosun gold
1hps eye horilux. that is as close to the sun as you'll get I suppose. goodluck lw