what kind of led YIELDS are you guys hitting?
- Thread starter Cold$moke
- Start date
ShLUbY
Well-Known Member
i've been doing a bit of research lately. seems like about 600-650 watts of LED (quality LED) is equivalent to 1000w of HPS for about a 4.5 x 4.5 footprint. LED is more efficient at putting out photons, and you lose less to heat (because you're running less wattage) and also you are directing the light much more efficiently than with an HPS, because HPS emits photons in all 360 degrees, 1/2 of which need to reflect to make it down towards the plants and lose energy (as heat) with each reflection.
i'm going to replace my 600 watt HPS hoods with LED this summer (hopefully) and replacing them with 500ish watts of LED, and i'm expecting an increase in yield for less power in the long run... seems like a good deal to me!
the cool thing about custom builds with LEDs is that you can design them to your space if you have an odd space to fill. By spreading the power over multiple COBs or boards, you can spread the coverage of your footprint with the light (custom placement) and have a more even distribution of light and less hot spots (like with HPS).
yields will depend on strain, but generally are at par with with 1000w HPS at the 650ish watt range, crush in GPW yields, and i've noticed that they seem to add density to the nugs. I gave a friend of mine a plant in my soil as he wanted to try an organic water only mix. His density was higher than mine with LED. He has platinum LEDs (which aren't even the best on the market).
Here's a fun little wrap up harvest results from growmou5 that i found very helpful in seeing the side by side (there are others on youtube as well)
dandyrandy
Well-Known Member
Bout a pound...
NanoGadget
Well-Known Member
I'm still waiting to see what the quantum board I am running now can do in flower, but I pulled around 1 gpw in a scrogged 3x3 with my CLW Solar Storm 440 on several occasions and that's a blurple pulling about 350 watts from the wall in bloom mode. I only have pics from 1 run with that light.
nevergoodenuf
Well-Known Member
Me personally, I like to run anywhere between 20-35/sf. with COBs. Most of my runs I screw something up, but still manage to see .8 grams/watt, with my best at 1.4 grams/watt. This was at 30 watts/sf.
dandyrandy
Well-Known Member
1gpw is quite doable with 3590's.
Rahz
Well-Known Member
Anywhere from 1.25 to 1.8 GPW. High end has always been hydro but I've got a nice harvest from coir/peat happening atm.
I think anyone with a 45-50% efficient lamp can do over 1.5 GPW with hydro or just under with soilless.
Regardless of media I always adjust water going in to 5.5-5.6 and let it rise. In hydro I adjust back down to 5.6 every day. I always use nutrient solution at 900-1000 ppm regardless of media. I've been using Recharge on this recent soilless grow. I also use mosquito bits, helps keep the gnats down to almost zero. I flush every other week.
(Recharge is a somewhat strong base. If you use it don't adjust PH until after adding the Recharge.)
The key IMO is to get the lamp down on the plants, as much as they can take without bleaching.
I think anyone with a 45-50% efficient lamp can do over 1.5 GPW with hydro or just under with soilless.
Regardless of media I always adjust water going in to 5.5-5.6 and let it rise. In hydro I adjust back down to 5.6 every day. I always use nutrient solution at 900-1000 ppm regardless of media. I've been using Recharge on this recent soilless grow. I also use mosquito bits, helps keep the gnats down to almost zero. I flush every other week.
(Recharge is a somewhat strong base. If you use it don't adjust PH until after adding the Recharge.)
The key IMO is to get the lamp down on the plants, as much as they can take without bleaching.
wietefras
Well-Known Member
Efficacy of the lights has a big impact on g/W. I was using lights which produced 2umol/J while others run at 2.5umol/J. Obviously the g/w will be higher when you get 25% more light from the same amount of watts. That same 1.5g/W would become 1.9g/W without doing anything different.
projectinfo
Well-Known Member
I got 1.5 lb with my 2x4 table and striplights
3x ultra lemon haze autos
I'm expecting much higher g/watt this time
3x ultra lemon haze autos
I'm expecting much higher g/watt this time
projectinfo
Well-Known Member
ANC
Well-Known Member
Yeah, I have like a hand width between the tops and the strips... I accidentally broke the top off my one plant when I trained it. was working at a shit angle and kinda zigged when I should have zagged.
Anyhow, I put the top in a bag of coco, so let us hope it roots. The plant is actually getting way better light now, I was just cutting off the largest fan leaves at the top to keep things lit down below, before that. I would normally trim and supercrop very hard, but I kind of want to see how much this strain can yield. My buddies say it is only like 25g per plant. I think they can't grow weed.
Anyhow, I put the top in a bag of coco, so let us hope it roots. The plant is actually getting way better light now, I was just cutting off the largest fan leaves at the top to keep things lit down below, before that. I would normally trim and supercrop very hard, but I kind of want to see how much this strain can yield. My buddies say it is only like 25g per plant. I think they can't grow weed.
projectinfo
Well-Known Member
Might root. I probably would have throne it in a cloner .
And I agree man, even looking at the seed banks. Their estimates for yield and thc seem rediculously low.
https://www.canukseeds.com/blueberry-feminized-seeds-canuk-seeds
projectinfo
Well-Known Member
ANC
Well-Known Member
I have a round wire fence around the plant so I have quite a secondary ring of tops. the top leaves are almost 20cm long and steal a lot of light. I leave them for the first few days until they start losing their lustre then off the come to give the colas below, the light. I went from thirty to two plants a bit unexpectedly, so I don't get that effect where the side shoots want to tunnel up like you have.
I have a few clones going so I will fill the tray better next round. Just keeping things low key as I am transitioning to growing on my own. Don't want people getting jealous. Might even do two trays next time. I have the relief of being totally independent now with my grow. and I have about 700W worth of strips still unopened in the dining room. It is now a medical grow. I am using my hybrid hydro and organic method. Which involves very low ppm salt feeds and organic feed and fungi. Basically doing what I do outdoors indoors, without the soil... But I am busy cooking up some soil outdoors. It takes like 300 days for soil to go through a full cycle of incorporating things like the biochar etc full, especially outside in soil beds.
I have a few clones going so I will fill the tray better next round. Just keeping things low key as I am transitioning to growing on my own. Don't want people getting jealous. Might even do two trays next time. I have the relief of being totally independent now with my grow. and I have about 700W worth of strips still unopened in the dining room. It is now a medical grow. I am using my hybrid hydro and organic method. Which involves very low ppm salt feeds and organic feed and fungi. Basically doing what I do outdoors indoors, without the soil... But I am busy cooking up some soil outdoors. It takes like 300 days for soil to go through a full cycle of incorporating things like the biochar etc full, especially outside in soil beds.
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projectinfo
Well-Known Member
Yeach my side shoots all came up to the top because of the shade it's working nicely.
In thinking IL have to lollipop a bit of the bottom.. And let all the tops go nuts. I've got another 3ft of head room and these should be almost done stretch
In thinking IL have to lollipop a bit of the bottom.. And let all the tops go nuts. I've got another 3ft of head room and these should be almost done stretch
