Lighting T5/CFL only thread (the manual)

they're 55 watt high output...sorry I looked it up...apx 20,000 lums total.....I think it's my 400 watt hps that puts out 55,000 lums ....
 
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roseman posted this on my old site as part of a CLF tutorial, i take no credit for it... just passing on the information hope it helps someone.

TOKE OUT



Look at a lumen/watt ration of various CFL's.
The higher the wattage of CFLs, the lower the lumen/watt ratio. This chart was submitted by Jerry Garcia, a grow buddy from another grow site, and edited for typos.

For example...
the 200w listed at 9250 lumens for a lumens/watt ratio of 9250/200=46.25

the 150w is listed at 7500 lumens for a l/w ratio of 7500/150=50

the 125w is listed at 6500 lumens for a l/w ratio of 6500/125=52

the 42w are listed for 2700 lumens, l/w ratio of 2700/42=64.28

I have some 26w that give off 1700 lumens for a l/w ratio of 1700/26=65.38

GE lists some 13w that give off 825 lumens for a l/w ratio of 825/13=63.46

So, according to these numbers the most efficient bulbs for growing are the 26w that emit 1700 lumens. If you used 8 26w bulbs (208 watts total) you'd be getting 13,600 lumens...4,350 more lumens than a single 200 watt CFL. AND the eight 26 watt bulbs would cost less than the one 200 watt bulb.

I suppose you need to purchase more sockets and cords and things to support 8 bulbs, but in the long run, more lower watt CFLs seem like the way to go.
 
... need to purchase purchase more sockets and cords and things to support 8 bulbs ...
Yeah, that's the b*tch right there- rigging them up to be best utilized... Also, I have a few of the smaller ones that have warmer(hotter!) ballasts than others of the same size. Maybe due to age, who knows. It's not wiring, because they'll also get that warm in a different socket, like a ceiling lamp, for instance.
Very cool post, Toke. :thumbs:
 
Question: all things being equal how many plants would you expect to be able to grow under a 4' x 8 bulb HO T5 setup?
 
I'm very happy with my 2 T5 Superplant tubes (but I use them for germinating and growing other plants than Cannabis for now :-) and as I wanted to buy one more, I found something great :

So, for your information, Culture Indoor makes a special offer for now (don't know since when nor until when...) :

T5 Superplant 432W growth 6500K 199€ instead of 299 link
T5 Superplant 216W growth 6500K 149€ instead of 199 link
T5 Lightwave 216W growth 6500k° 149€ instead of 241 link

When I ordered mine in 2010, I had'nt to pay shipping for Europe.
 
Question: all things being equal how many plants would you expect to be able to grow under a 4' x 8 bulb HO T5 setup?

Hay man sorry its took so long to answer, what size pots do you have?

Edit: a fellow mod uses the same t5 and gets 8-10 autos under in 1 gal pots.
 
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Hay man sorry its took so long to answer, what size pots do you have?

Edit: a fellow mod uses the same t5 and gets 8-10 autos under in 1 gal pots.

Thank you!

I currently use 3.5 gal buckets for my DWC setups.
 
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