All COB Users - Lettuce Grow Challenge!!

Evil-Mobo

Evil-Mobo

Well-Known Member
OneHitDone said:
You could always rig up a small bubbler or something for fun too :hump:
Click to expand...
Yeah once the mmj plants are all kicking strong I want to rig up something hydro for the veggies and fruits we just got some basil today and a lime tree for the tent so ............

And my brother just got a bunch of seeds from burpee says he has to give me
 
frica

frica

Well-Known Member
frica said:
5 gallon pot, some sort of Bhut Jolokia. Leaves are supposed to be this huge for this particular strain.(from what I've read, was worried at first)
Currently under 100w of LED bulbs, 6 13W philips 1521 lumen ones, and 1 20W Osram 2452 lumen with the cover still one. Will add 2 20W Osrams with the cover removed soon, all 2700k.
Light is about 26 inches from the plant
Edit: light schedule is 16/8

Internodes are pretty tight.
Also very tight on the ones in the small cups.

Expiriment to see how good the new bulbs were.
When I first put it under the light when it was just from the cup, it turned insta droopy from light stress, wonder if it will do it again when I put the 2 extra Osrams in it and lower the light.

Right now it looks pretty comical with the huge leaves way too tight on each other.








Click to expand...
Update time, screwed in another 20W Osram parathom a few days ago.












 
Yodaweed

Yodaweed

Well-Known Member
i think the sun is too strong on my lettuce, it's fading a bit and got some weird red spots on it (kinda looks like its turning purple) not really sure what's up with it.
 
muleface

muleface

Well-Known Member
pinner420 said:
Installed propane heater today. I have a comparison for you.. 100 watts t5 on the left 9 watts on the right. The one on the right has 1/3rd more plant mass..
Click to expand...
LOL! I have been watching this growth process and thought "what the hell is he talking about?" I thought you said you were growing Romaine, but its Roma tomatoes. Now everything makes sense. I was thinking wow, that is one leggy lettuce plant.

So what is the plan when it gets bigger? Are you going to see if you can get tomatoes under a 9 watt led? Or will you put it under something else, or is that what the greenhouse is for?
 
D

Diysystem

Member
Well seems that i have to do everything myself as no one here are intrested in spectrum respond in lettuce anymore.

I have orderd XP-G3 cold white, neutral white and warm white. LM561C 3000k, 3500k, 4000k and 5000k strips. XT-E royal blue and XP-E photo red.

Will do the following test in the next 6 weeks to se how lettuce respond to different light recipes.

XP-G3 cold white only
XP-G3 neutral white only
XP-G3 warm white only
XP-G3 cold white + 660nm photo red 75/25
XP-G3 neutral white + 660nm photo red 75/25
XP-G3 warm white + 660nm photo red 75/25
LM561C 3000k only
LM561C 3500k only
LM561C 4000k only
LM561C 5000k only
LM561C 3000k + 660nm photo red 75/25
LM561C 3500k + 660nm photo red 75/25
LM561C 4000k + 660nm photo red 75/25
LM561C 5000k + 660nm photo red 75/25
XP-E photo red + XT-E royal blue 60/40
XP-E photo red + XT-E royal blue 75/25
XP-E photo red + XT-E royal blue 80/20
XP-E photo red + XT-E royal blue 90/10

Test period 30 days from seedling. Biomass, texture, structure and dry weight will be recorded

Hope this thead will go back to its roots soon
 
RandomHero8913

RandomHero8913

Well-Known Member
DIY,

I'll be running a single light in each box and all being controlled by one driver. I'm planning on starting down near 350ma and working up to 700ma. Here is the data from the Citi Calc:

1212 2700K90Min 1 COBS @700 mA ON 1.813 PROFILE HEATSINK
1 SQ.FT. CANOPY 94% EFFICIENT DRIVER @1 CENTS PER KWH
Total power watts at the wall: 24.74
Cobs power watts: 23.25
Total voltage forward: 33.22
Total lumens: 2847.38
Total PAR watts assuming 10% loss: 7.79
Total PPF: 42.58
PPFD based on canopy area: 458.34
PAR watts per sq.ft.: 7.79
umol/s/W: 1.83 LER: 329.00 QER: 4.92


1212 2700K90Min 1 COBS @350 mA ON 1.813 PROFILE HEATSINK
1 SQ.FT. CANOPY 94% EFFICIENT DRIVER @1 CENTS PER KWH
Total power watts at the wall: 11.92
Cobs power watts: 11.21
Total voltage forward: 32.02
Total lumens: 1468.60
Total PAR watts assuming 10% loss: 4.02
Total PPF: 21.96
PPFD based on canopy area: 236.40
PAR watts per sq.ft.: 4.02
umol/s/W: 1.96 LER: 329.00 QER: 4.92
 
Dreddd

Dreddd

Well-Known Member
muleface said:
LOL! I have been watching this growth process and thought "what the hell is he talking about?" I thought you said you were growing Romaine, but its Roma tomatoes. Now everything makes sense. I was thinking wow, that is one leggy lettuce plant.

So what is the plan when it gets bigger? Are you going to see if you can get tomatoes under a 9 watt led? Or will you put it under something else, or is that what the greenhouse is for?
Click to expand...
Not sure about his 9W led.... but i got these babies under 2x14.5W led bulbs, yes those are beefsteak tomatoes.
20170319_112055.jpg
 
OneHitDone

OneHitDone

Well-Known Member
Diysystem said:
Well seems that i have to do everything myself as no one here are intrested in spectrum respond in lettuce anymore.

I have orderd XP-G3 cold white, neutral white and warm white. LM561C 3000k, 3500k, 4000k and 5000k strips. XT-E royal blue and XP-E photo red.

Will do the following test in the next 6 weeks to se how lettuce respond to different light recipes.

XP-G3 cold white only
XP-G3 neutral white only
XP-G3 warm white only
XP-G3 cold white + 660nm photo red 75/25
XP-G3 neutral white + 660nm photo red 75/25
XP-G3 warm white + 660nm photo red 75/25
LM561C 3000k only
LM561C 3500k only
LM561C 4000k only
LM561C 5000k only
LM561C 3000k + 660nm photo red 75/25
LM561C 3500k + 660nm photo red 75/25
LM561C 4000k + 660nm photo red 75/25
LM561C 5000k + 660nm photo red 75/25
XP-E photo red + XT-E royal blue 60/40
XP-E photo red + XT-E royal blue 75/25
XP-E photo red + XT-E royal blue 80/20
XP-E photo red + XT-E royal blue 90/10

Test period 30 days from seedling. Biomass, texture, structure and dry weight will be recorded

Hope this thead will go back to its roots soon
Click to expand...
This is great and exactly what we need. I am very happy to see that those with the resources to do so are grabbing up a bunch of different led's and trying this and hopefully sharing the outcome.
That was the whole point in this thread, to work together to find the solution that truly produces not just biomass but proper structure, texture, color, etc.
I know most of the people on this site think its lame or a waste of time and effort growing lettuce, but this right here will be key in unlocking the next level of cannabis turpine production under led
 
pinner420

pinner420

Well-Known Member
muleface said:
LOL! I have been watching this growth process and thought "what the hell is he talking about?" I thought you said you were growing Romaine, but its Roma tomatoes. Now everything makes sense. I was thinking wow, that is one leggy lettuce plant.

So what is the plan when it gets bigger? Are you going to see if you can get tomatoes under a 9 watt led? Or will you put it under something else, or is that what the greenhouse is for?
Click to expand...
Gonna clone it heavily then try some flowering...
 
D

Diysystem

Member
RandomHero8913 said:
DIY,

I'll be running a single light in each box and all being controlled by one driver. I'm planning on starting down near 350ma and working up to 700ma. Here is the data from the Citi Calc:

1212 2700K90Min 1 COBS @700 mA ON 1.813 PROFILE HEATSINK
1 SQ.FT. CANOPY 94% EFFICIENT DRIVER @1 CENTS PER KWH
Total power watts at the wall: 24.74
Cobs power watts: 23.25
Total voltage forward: 33.22
Total lumens: 2847.38
Total PAR watts assuming 10% loss: 7.79
Total PPF: 42.58
PPFD based on canopy area: 458.34
PAR watts per sq.ft.: 7.79
umol/s/W: 1.83 LER: 329.00 QER: 4.92


1212 2700K90Min 1 COBS @350 mA ON 1.813 PROFILE HEATSINK
1 SQ.FT. CANOPY 94% EFFICIENT DRIVER @1 CENTS PER KWH
Total power watts at the wall: 11.92
Cobs power watts: 11.21
Total voltage forward: 32.02
Total lumens: 1468.60
Total PAR watts assuming 10% loss: 4.02
Total PPF: 21.96
PPFD based on canopy area: 236.40
PAR watts per sq.ft.: 4.02
umol/s/W: 1.96 LER: 329.00 QER: 4.92
Click to expand...
You're on point. Remember not to exceed 20 mmol/d or you will get tipburn.

Would anyone here be intrested to start a skype group for vegetable testing, studies and buisness talk? My research is for commerical indoor farming and would love to talk to same minded people :)
Designing my own light and then manufacture it in large scale on mcpcb is the next step after getting the results. If someone could help i'll appreciate it :)
 
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