Fluence LED's shorten flower cycle
- Thread starter SmokinR1
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- fluence led super lemon haze
projectinfo
Well-Known Member
Pictures and a grow journal or your full of shit.
Sounds like a spam sandwich.
Sounds like a spam sandwich.
dandyrandy
Well-Known Member
I wouldn't be surprised. My finish times under led run a couple weeks ahead of others I see running the same strains under hid. I believe before the last riu crash someone had a few points about this.
projectinfo
Well-Known Member
I use50/50 blue orange
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VegasWinner
Well-Known Member
very possible as fluence uses full spectrum approach including appropriate reds and blues to initiate Emerson effect thereby shortening flower cycle.
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The pigment phytochrome is responsible for mediating flowering response in plants, phytochrome is very sensitive to red light so it makes sense that the excess in red would stimulate flowering growth. 3500k seems to be a real good spectrum
SmokinR1
Active Member
Just thought it was weird that I've never seen any information about LED's shortening flower cycle before. Other differences on the LED side were more uniform growth, better vertical penetration, and a more defined terpene profile. On the other hand the 3 extra weeks in flower under the HPS's made some monster buds that grew into each other.
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LEDs can have a good color spectrum in terms red:blue ratio but it's hard to match the intensity and projection of a nice HID lamp and reflector
Humple
Well-Known Member
Wanna bet?
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Im running an experiment with cheap LEDs now, so far it looks good. There's still lots of flowering time left for buds to grow and swell.
What g/watt do you pull with your LEDs?
Humple
Well-Known Member
I'm hovering around 1g/w for the time being. Better growers than I are consistently pulling considerably more. And if by cheap you mean Mars Hydro, Viparspectra, Kind, Platinum, Advanced, or any of the other Chinese blurples, don't think you can make any kind of accurate judgement about the merits of LED. That's a completely different thing from COBs, Quantum Boards, and strip lights, which - watt-for-watt - give you more "intensity" than HPS (if you're measuring intensity by any scientific measurement used for light). Because modern white-light LED is more "intense", you'll find that most former-HID growers here have replaced their MH/HPS with about 60% of the wattage.
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They're cheap ~$5 70 watt "full spectrum" pink COB chips. They are of a different construction I have never seen before on an aluminum substrate. Definitely not the same as the old style cheapo COBs. My batch have very good electrical characteristics and the individual chips on all of my COBs seem to be perfectly matched.. which I have never seen before from a cheap chinese COB. The spectrum seems to be good, my plants are growing at a rate I have never seen before under HPS. In about 4-5 weeks I should have a result.
Randomblame
Well-Known Member
Yeah, it seems there is finally a second generation of generic COB's.
Twice as much diodes(50w COB has 10S10P or 4S30P), thinner PCB's, better manufacturing quality. Would be interesting to compare them with gen.1. But the 70 and 100w chips both have 14x 10 diodes, which is why I think they are the same, even if there is a price difference.
The 50w(32 or 12v) chips seem to have the best price / performance ratio as they do not even cost 2$.
https://www.ebay.com/itm/50W-Full-Spectrum-LED-COB-chip-DC12V-32V-Integrated-Smart-IC-Driver-220V-110V/322658790343?hash=item4b1ff66bc7:m:mimPgeDXE3mSW3xSy8YYRAg
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You should have seen the look on my face when each individual diode lit evenly at actually 1 watt each at full power. They have come a very long way indeed. I built my lights out of old computer heatsinks and a 3d printed frame so they cost me $10 out of pocket each, an extra $5 if I have to find an old heatsink to buy or salvage.
Bonus photo of all different versions. The lensed COB is an experiment.
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Randomblame
Well-Known Member
Hmm! The 7B10C is actually a 35w chip. That they run smoothly with 70w testifies significant improvements over generation 1. You can get these COB's with up to 140 diodes(10S14P) but I would not try to run it with 140w because they all have the same footprint. Maybe with a better heatsink?!?
What I like is that they start to glow much smoother now, all at the same time. They can be dimmed well or run low at 350mA/10w for better efficiency.
I briefly considered using these COB's as a support for flowering, but chose CRI90 Bridgelux COB's then.
BTW, they are also available in white spectrums.
What I like is that they start to glow much smoother now, all at the same time. They can be dimmed well or run low at 350mA/10w for better efficiency.
I briefly considered using these COB's as a support for flowering, but chose CRI90 Bridgelux COB's then.
BTW, they are also available in white spectrums.
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I have tried to find a datasheet for these but I can't find shit. I don't know if they kept the same part number but I wouldn't put it past them, there are definitely electronically matched 1 watt diodes in there.
I am purposely avoiding using the white spectrum, even though this pink is extremely annoying to photograph and work with.
I actually have some of their 30 watt white COBs, the diodes were also very well matched, but I opted for pink for a few experimental reasons. I wish I could get a datasheet and some more info about these lights. I don't even know the measured spectral power distribution. I don't know what color the individual diodes are or what kind of phosphor is being used, super annoying.
They sell a 100 watt, 100 diode chip that is in the same package that I think would be perfect to drive at half or 3/4 current. If I were to start over that's the route I would probably go, each with their own current limiting circuit. I don't use them like you would use a name brand COB, the intensity falloff on these bare chips is bonkers so I keep them under 10" from the canopy. The 60 degree lens sort of solves this but has it's own drawbacks.
Also I assume their electrical efficiency is probably relatively low, otherwise CREE and Vero would probably be out of business selling their $40 chips.
I wish I had a quantum par meter, but the intensity readings on my garbage LUX meter are fantastic. Hoping the spectrum is good.
My plants will have to be my quantum par meter
I am very interested if I will come close to my yield goal with such cheap, simple lights.