Under side lighting. CXB3590's

Airwalker16

Airwalker16

Well-Known Member
I have gone ahead and taken the cobs off my very first build ever, and stuck them onto the 3 small heatsinks 14.6"X4.75" 2 per sink. I'm going to have them facing upwards, sitting each on a small plastic stool to elevate them. I've also added my super old glass lenses to them just as a safety precaution. I figure leaves can and will undoubtedly drop down and land on these so bare cobs seemed like a bad idea. These cobs all have graphite pads adhered to the backs of them bit I'm going to use some thermal grease how since the lenses will be used.
I just wanted to show this idea I had since my larf is literally 1/3if not more of weight I'm losing do to the lack of ANY light getting down that far.
These will provide more than enough to cause photosynthesis and chlorophyll to produce keeping the buds green rather than light green and nearly ghost white.
Quite excited about it.
Only question I'm having is what to run them at. I have a spare HLG-240H-C1750B I could dim down. I'd use 2 parallel rows of 3 in series. But also Contemplating just buying another LRS-100-36.
2 of the 3 cheap Chinese drivers I salvaged from the ECOSunlite for my new build Shit on me so I had to fix it and opted for an LRS-100-36. 33.3w per cxb3070 is a bit less than the 50 they were running at, but I figure it saves me 50w to use down on these under lighting fixtures I've put together.

Use the HLG?
Buy another LRS-100-36?
OR I'm also considering an LRS-150-36, so each cob gets 25 watts rather than 16.6w. I'll add pics here when I get a second tonight for you to see. Buy the heatsinks aren't substantially big, but in the ecosunlite each one had close to 130w running on it with 2 small 120mm fans to cool them before I gutted it.
 
J

Jqwerty1

Well-Known Member
Seems like you know better then me but more lights, more growth bottom line. I think youre always going to have larf. Waste of efficiency in my opinion, unneeded fire hazard and risk of developing growth deformities. Doubt its effectiveness in that configuration as well. Mount it to something horizontally at like 2-3ft rather than vertical, rotate sides every day.
 
Airwalker16

Airwalker16

Well-Known Member
Jqwerty1 said:
Seems like you know better then me but more lights, more growth bottom line. I think youre always going to have larf. Waste of efficiency in my opinion, unneeded fire hazard and risk of developing growth deformities. Doubt its effectiveness in that configuration as well. Mount it to something horizontally at like 2-3ft rather than vertical, rotate sides every day.
Click to expand...
Larf is the result of lowers not getting enough light. Period.
This is just an experiment to throw some light up at the lower nugs that get COMPLETELY shaded out by the upper canopy. Any light down below will make quite a difference I'm thinking.
If you look at large warehouse runs, where plants are spaced far enough apart and under DE HPS, The buds are uniformly mature all the way to the bottom.
And that's a result of not being in a tent, open to the air and light that's able to penetrate down there.
Unfortunately the only downside to LED, is penetration. Because we use so many points of light, down to individual diodes, to cobs, to boards.
They could be as powerful penetration wise, but Spectrum Kings ain't my style. ;)
 
Airwalker16

Airwalker16

Well-Known Member
diggs99 said:
Ya any updates on how this experiment went AW?
Click to expand...
Absolutely beneficial. Next run wil be 4 ft one sided direct AC wiring LED tubes. I'll just run pos and neg from a wire, split them into 4 lengths each and cap with female bullet connectors to slide On to the T8 pins. Only one side needs wiring with the ones I've looked at.
They'll slide into a canopy or lay right on top of my buckets this time making a lot more use of the photons.
 
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