Please look and Give me advice.

Syriuslydelyrius said:

Its not the average amount of lumen per sqft its the total and read anywhere about enough light for indoor gardning and there going to tell you 2,000 to 3,000 lumen per sqft. 3,000 is no where near excesive. The amount of lumens the sun produces does very however it can be higher than 100,000 lumen per sq meter which is more than 9,000 lumen per sqft.


Your math doesnt make sence to me and is confuseing considering that those 4 shop lights are not in the same square footage. Is it possible to explain your math better? Lets try not to confuse this guy because he seems confused enough running a 250w switchable ballast yet is still running the MH in flowering.

Click to expand...

This is the light set up as you can see it's enought to grow dope.

It is 4 bulbs each bulb is a 20 watt T-12 flow @ 900 lumans. It say this on the package so we know this is correct.

The grow area is 12" x 24" or 2 sq ft.

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This is the formula:

sq rt (light 1^2 + light 2^2 + light 3^2 + light 4^2) = lumans of 4 light bulbs

to solve:

900 x 900 = 180000

we have 4 bulbs add 4 time or 4x so

18000 x 4 =2340000

now take the sq rt of that # = 1800

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As for area we have 2 sq ft so

1800 / 2 = 900 luman per sq ft.

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Now work with cfl's and aroun 1650ish (from memeroy) it will take 4 to double the out put.

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Think this way 1 dim. = distance.

to move you pawn tw squars on a chess bord will take 2 turns moving 1 per turn.

Distannce is 1 dim. so just add them up (most thing we want to add are this way)

Area is distance in two direction "Distance A" x "Distance B" so on the same chest board you have 1 light and it can light up an area of 2 squarse long by 2 squares wide how many squares is that.

Now if I wold like to light up double the space an area of 4 square x 4 squares how many lights?

The answer is 4 Each light can light up 4 square and we have 16 that needs light.

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If that does not help than you will need to look it up your self.

Where are you getting this math??? Are you trying to use the the inverse square law? Take a look at this webpage or just about any other indoor growing info page. http://www.gardenscure.com/cultivation-bible/bible-02.php My garden is 12x12 and I burn 6 600w HID lamps at 90,000 lumen each. If I do the math your way I only have 1530 lumen persq ft and I do the math as I should by adding up all the lumens and dividing that by the sq ft I get 3750 lumen per sq ft.

If you read that webpage I linked under "how much light do i need?" it states that up to 7,500 lumen per sq for optimal and your calling 4,000 excesive?

Im too stoned to bother to comprehend why your making all that math that hard.

the forumla is quite simply, for a novice in simple algerba.

Lumens Divded By Square Feet = Lumens Per Sqft.

of course nothing is exact, but its the best your going do get. in the end with that simple forumla you get the same answer, no need to do all that math.

4x 900 lumens tubes

900*4=3600

2 Suare Feet

3600 / 2 = 1800 lumens per sqft...

Syriuslydelyrius said:

Where are you getting this math??? Are you trying to use the the inverse square law? Take a look at this webpage or just about any other indoor growing info page. http://www.gardenscure.com/cultivation-bible/bible-02.php My garden is 12x12 and I burn 6 600w HID lamps at 90,000 lumen each. If I do the math your way I only have 1530 lumen persq ft and I do the math as I should by adding up all the lumens and dividing that by the sq ft I get 3750 lumen per sq ft.

If you read that webpage I linked under "how much light do i need?" it states that up to 7,500 lumen per sq for optimal and your calling 4,000 excesive?

Click to expand...

its a good sight it just doesn't tell you how to sum lumans.

all i'm saying is how to add it correctly. what you do with the # is up to you.

As for the formula look up light in any "physics text book" it a standard thing.

I am a better student 25yr ago than a teacher now so look it up.

and think about the checker board ex.

It will come and think about the math remember are = a x b and distance = a or b

russ0r said:

Im too stoned to bother to comprehend why your making all that math that hard.

the forumla is quite simply, for a novice in simple algerba.

Lumens Divded By Square Feet = Lumens Per Sqft.

of course nothing is exact, but its the best your going do get. in the end with that simple forumla you get the same answer, no need to do all that math.

4x 900 lumens tubes

900*4=3600

2 Suare Feet

3600 / 2 = 1800 lumens per sqft...

Click to expand...

with you ex you are 2x i'm saying it only 900

but your first part is correct the # make no diff and dope will grow under the pic i post no mater if it 900 or 1800 luman, it still grow and we all we agree its no way close to 3000 luman, no one can make the math do that.

So you don't have to max the light size.

just max the way you use what you have.

The pictures the orignal guy proves you can grow under less then the recomended light. You could grow from seed to harvest with just a 100w incandescent bulb but its not like your going to be happy with the yield.

The simple and easy way to configure lights = add the lumens / sq ft and shoot for arround 4,000 per sq ft.

Thanks guys for all the advice and info. It appears that I need to clean up the pollen mess and downsize my growroom. I am also going to use the mylar to help my lights. I am going to harvest the male plant tonight and finish growing my seed infested ladies. Wish me luck smokin the male bud....I will report back and let you know if it got me high. Should I smoke the leaves as well or just the bud?

Lookin good everyone. Its so nice to have this online site ha?
check me out......comments/advice is welcome and I hope to talk to all of u!
peace
https://www.rollitup.org/newbie-central/177860-10x10-medicinal-hydroponic-grow-room.html

I hope next time you kill off those guys.... Or just do clones of your girls