LUMENS, They don't add up?

YOU GUYS NEED TO TAKE A FEW HITS AND MELLOW OUT. I found my answer to this question (to my satisfaction), in a couple of pics in Al B.'s gallery. A light meter with one light and and the same meter with two lights, guess what the reading was in both pics? THEY WERE BOTH THE SAME. they dont add up. END THIS THREAD.

That measurement is wack. Look at my thread, man. Seriously. At least look at the pictures.

https://www.rollitup.org/indoor-growing/83128-lumens-lux-adding-all-up.html

And, now that I think about it, if you don't like this thread, DON"T READ IT. Sorry that we didn't make it so you like it. Except not really.

I did read you stuff. VERY INTERESTING The same type of experiment, with different results. So which meter is right. The argument rages on. I know, yours is right, his is wrong. I dont wish to speak for anybody. but im sure there are a lot of folksout there that will say your meter is wack. Me I dont know, thats why Ive asked this question.

so why did my grow room get brighter as i added more cfls? example: at the begining of our grow we didn't have many bulbs and we could easily look at them without having to use sunglasses. now that we have alot more cfls we need shades to view our bitches.

cannabitch said:

so why did my grow room get brighter as i added more cfls? example: at the begining of our grow we didn't have many bulbs and we could easily look at them without having to use sunglasses. now that we have alot more cfls we need shades to view our bitches.

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bingo. this is the anecdotal evidence that covers this site that makes experiments an unnecessary second opinion ...

ceestyle said:

well, if you put them closer to the plant, of course it will be more intense. that has nothing to do with lumens adding.

I am willing to bet that you are basing your second statement regarding CFLs on nothing but personal opinion. I challenge you to provide me one reason why that is the case.

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personal experience for me is the law.ive grown under most lights,cfl,s,400,600,1000,t5,s,and im just saying that a 1000 really lights up the room,and i find it gives the best hardest buds around.but that is only my personal experience.

trapper said:

personal experience for me is the law.ive grown under most lights,cfl,s,400,600,1000,t5,s,and im just saying that a 1000 really lights up the room,and i find it gives the best hardest buds around.but that is only my personal experience.

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yeah, the problem is that it's practically impossible to get a combination totaling 1000W worth of lumens in the same space with the same reflector efficiency.

Can someone answer this please? i didnt find my answer. so if i put 12 42 watt cfls on a 3 foot row above my plants 2 beside each other across the 3 foot row. will or will i not get 33600 lumens if each bulb is 2800 lumens??

HitmanX111 said:

Can someone answer this please? i didnt find my answer. so if i put 12 42 watt cfls on a 3 foot row above my plants 2 beside each other across the 3 foot row. will or will i not get 33600 lumens if each bulb is 2800 lumens??

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Technically, you will get that many lumens. but because they're spaced over three feet, each plant will be relatively far from a number of bulbs, while being closer to others. Know what I mean? The relative quantity is the lux ... think about it like this - if you have a bulb that's 20 feet from your plant, who cares how many lumens it will produce?

The moral of the story is, however, that more bulbs ARE better, and not just for coverage area.

thanks man. um but yeah like i plan on growing maybe 3 or just 2 plants in a 3x2 foot closet and i would have the light across the whole top of the plants. and only like what 6-8 inches above the plants?? do u think they would be straight?

yeah check out the link i just posted. it's of a 3x1.5 cab that had 6x42W and some happy ladies. they began flowering and looked quite nice, but I added HPS to kick it up a notch. adding more CFL would also help that. You can have them closer than that, probably 4-5" would be fine.

hell yeah. yeah i kno man ur plants looked beautiful under ur setup =D very nice man. but thanks alot man thats what i needed to kno. +rep for u my friend =D

ceestyle said:

yeah, the problem is that it's practically impossible to get a combination totaling 1000W worth of lumens in the same space with the same reflector efficiency.

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a total of 600 watts of cfl,s dont do what a 600 hps does,that i know.if others have tried it and got better results good for you,i havent,as well it is an utter waste of time fiddling with that many cfl,s.

trapper said:

a total of 600 watts of cfl,s dont do what a 600 hps does,that i know.if others have tried it and got better results good for you,i havent,as well it is an utter waste of time fiddling with that many cfl,s.

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Sorry, I didn't mean to imply that equal wattage would be the same. Obviously with the lower lumen/watt of CFl, you won't even get the same amount of light.

What I meant to say was regarding equal lumen output. For example, look at the thread in my sig - you can get about the same output from 250W CFL and 150W HPS.