2700k, 3000k, 3500k, 6500k... wtf?

eyderbuddy

eyderbuddy

Well-Known Member
Rahz said:
Same here. The reason it's worth pointing out is that LED is capable of running multiple tiers under an 8 foot ceiling, especially with the strips people are using these days. If you absolutely want to keep plant height down low as possible, cut out the deep red during veg and lay it on during flower.

I'm still trying to figure out whether there are yield variations, currently working with 3000K 70CRI -vs- 3500K 80CRI.

Observations so far, the 3000K 70CRI lamp produced a better looking veg plant, few inches taller while still looking just as full, 3500K 80CRI caught up during flower so they're about even now. Previous results with these two spectrums were more similar, but being up close and personal allows me to get a closer look and see smaller differences. The differences aren't as dramatic as what I observed with the 90 CRI spectrums but they were still apparent. Final flowering results are difficult to eyeball. I'm about a week away from harvest and can't tell enough of a difference to make a guess on yield.
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what do you mean multiple tiers btw?

OLD MOTHER SATIVA said:
think you missed the last plant shots
imagine these in 14 more weeks..lol
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Do you think the differences in color between the 3000K and 5000K grows are due to the lights Or phenotype?
 
Rahz

Rahz

Well-Known Member
I've never done it but I've played around with designs. It could be built from wood or wire frame shelving can be bought in almost any size online. A 2x4 x 84" shelf was around $200 if I remember correctly. There was also a 2.5x5' version. Middle shelf may need to be insulated, foam board with a galvanized drip pan should be plenty. I decided a simple duct system would work for exhaust but I never got around to doing the math/testing on the fluid dynamics. Basically would be a box on the side of the unit that extends from just below the 2nd shelf to about a foot above the top shelf. Hole at bottom of box draws air from bottom space. Smaller hole just below the top shelf draws air from the tops space. The box extends high enough above the top shelf to add a fan/filter which would rest on the top shelf. The whole unit would fit under an 8' ceiling.

Ideally both shelves would be fitted with high CRI lights and plants would go 12/12 straight from seed/clone. If filtering the air wasn't a concern it would be much easier to build. Either way, 2 of the 2.5x5' units would provide 50 sq/ft of growing space in a smaller room with plenty left over.
 
Brock_Fawkin_Samson

Brock_Fawkin_Samson

Active Member
OLD MOTHER SATIVA said:
churchhazes comment interests me..not having any straight red diodes [anymore]



the plants did not really care..

the ratio of N to P made more difference in resin production than spectrum..

the plants basically looked similar..they enjoy Photons food and warm temps though
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Wana drop that N to P ratio knowledge on me? :bigjoint:

Any finishing pics under the different lights you posted? Couldn't find any?
 
meangreengrowinmachine

meangreengrowinmachine

Well-Known Member
geesh I leave for a bit and everyone seems to be in quantum boards or strips... I was still thinking of finishing up my conversion using COBS... thinking a total of 20 - 25 CXB3590s at 1000 - 1250 watts all 3500K should be ok? I have a set of 5 currently running at 250watts and had run that in tandem with my old tech my 600W HPS and was just thinking of getting basically 3 or 4 more of those and replacing and upgrading my flower room. Do you think I need 25 or should 20 be ok? In the past I had ordered from Timber just for ease of putting things on the frame and not having to worry about sending money overseas... what you all think? (sorry for thread hijack opp)
 
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