hey guys do you think that t8 flouro tubes will grow good bud

johnnny

Well-Known Member
i bought a bunch of them t8 fixtures. but theres alot of hype about t5 why? whats the big difference?
 

webb107

Well-Known Member
i bought a bunch of them t8 fixtures. but theres alot of hype about t5 why? whats the big difference?
I dont use T5 never have but i think its because they put out more light. More light=bigger plants/more yeild (also not forgetting many other factors)
 

sso

Well-Known Member
it will grow good bud, sure.

you could also overdrive the t8´s if you wanted more intense light, similar to t5´s, but you´d need to sacrfice a few lights to scrounge ballasts or buy new ones and you´d need to deal with more heat, as with the t5´s (hotter than t8 and need to run at 35c for maximum efficiency as opposed to t8´s 28c)

course, you´d get bigger buds with hps, but not better and this is what you got and it works.
 

johnnny

Well-Known Member
it will grow good bud, sure.

you could also overdrive the t8´s if you wanted more intense light, similar to t5´s, but you´d need to sacrfice a few lights to scrounge ballasts or buy new ones and you´d need to deal with more heat, as with the t5´s (hotter than t8 and need to run at 35c for maximum efficiency as opposed to t8´s 28c)

course, you´d get bigger buds with hps, but not better and this is what you got and it works.
wow i didnt even realize the temp thanks for the info guys.im planning on running 12 tubes total lumen output 33,600 will that be enough for 12 plants. 4 foot t8 32 watts a bulb im gonna try to cover a 3 ft width 8 feet long.but yea is that good enough
 

sso

Well-Known Member
hmm, though the temps are probably similar, becuase you need more watts to equal the t5´s (using t8)

you could also have the t´5s closer to one another.

but, then again, t5´s are ridiculously overpriced, you´d get far more light for the same money with the t8´s.
 

sso

Well-Known Member
12 plants? how big?

cause , youd want those bulbs as close as their individual reflectors allow them to be.
might want some of these bulbs as sidelighting too (might want to play with vertical vs horisontal too, just for kicks)

hehe, so you are wanting yield? that space would be best covered with 2 600w´s hps or so. or 3 400, i wouldnt put 1000´s in there.

you are going to get very skimpy plants with that amount of light in that space.

could run the 12, but only as very small plants in a sog (sea of green) if you wanted healthy good looking plants.

how high is the space?
 

johnnny

Well-Known Member
hmm, though the temps are probably similar, becuase you need more watts to equal the t5´s (using t8)

you could also have the t´5s closer to one another.

but, then again, t5´s are ridiculously overpriced, you´d get far more light for the same money with the t8´s.
yea thats the main reason y i got them. the 4 bulb t5 fixture was 80 compared to the t8 2 bulb fixture priced at 20 bucks.
 

johnnny

Well-Known Member
12 plants? how big?

cause , youd want those bulbs as close as their individual reflectors allow them to be.
might want some of these bulbs as sidelighting too (might want to play with vertical vs horisontal too, just for kicks)

hehe, so you are wanting yield? that space would be best covered with 2 600w´s hps or so. or 3 400, i wouldnt put 1000´s in there.

you are going to get very skimpy plants with that amount of light in that space.

could run the 12, but only as very small plants in a sog (sea of green) if you wanted healthy good looking plants.

how high is the space?
yea i was going for sog lst supercroppng.as for height i got 6 ft.
 

johnnny

Well-Known Member
oh yea i wanted 400 watt hps but home depot only carries 70 watt security light and heat is a big issue.
 

sso

Well-Known Member
funnily you arent far from 400w´s with your fluoro tubes.

and the hps is more efficient at turning watts into light not heat (though the fluo spread it out more and fool you)
plus can be remoteballasted more easily (the ballasts are probably combined about 10c increase in temps, similar to a single 400w ballast)

but anyways, its a good start, growing with fluo, learning the plants, learning how to deal with heat and position of lights.
could use the fluo later down the line as veg lights or supplemental sidelighting.

6 feet is plenty for a 400w or more, you cant went that space? what are the normal temps in there?
 

Gastanker

Well-Known Member
Problem with the t8's is the throw distance. Flouros don't throw their light very far to begin with with CFLs throwing the furthest, then t5s then t8s. When using t8's make sure they are super super close to the plants - perhaps have a couple standing vertical in the midst of the plants. Nice thing is they don't give off much heat so much so that the plants can touch them with no problems. I use t8's for side lighting and UV supplementation.



I want to build a vertical t5/t8 setup with CFLs up top like this - think it could do wonders with lollipops.
 
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johnnny

Well-Known Member
Problem with the t8's is the throw distance. Flouros don't throw their light very far to begin with with CFLs throwing the furthest, then t5s then t8s. When using t8's make sure they are super super close to the plants - perhaps have a couple standing vertical in the midst of the plants. Nice thing is they don't give off much heat so much so that the plants can touch them with no problems. I use t8's for side lighting and UV supplementation.

nice setup.so those cfls go farther. i was planning on buyin 20 100 watt equivelent cfls but the t8 for less money and more lumens was the best deal for me ill probably throw some cfls for side lighting.but yea thanks for the info.
 

sso

Well-Known Member
as long as there is adequate airflow, the high temps wont matter so much, (might get bit airier the buds or bit less yield, but nothing extreme)

and ive found that as long as the containers themselves (for soil and roots in my case) stay adequately cold, there is less problem (if any) with higher canopy temps.

(in nature plants frequently withstand high temps, solely by the fact of the cooling ground)
 

johnnny

Well-Known Member
as long as there is adequate airflow, the high temps wont matter so much, (might get bit airier the buds or bit less yield, but nothing extreme)

and ive found that as long as the containers themselves (for soil and roots in my case) stay adequately cold, there is less problem (if any) with higher canopy temps.

(in nature plants frequently withstand high temps, solely by the fact of the cooling ground)
very true i plan on getting a 400 watt cooltube but until then i gotta work with what i got hope all goes well.
 
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