Seedling grows toward one side despite sufficient light

JuanJadinero

JuanJadinero

Member
Hellow fiends, this is the fifth day my auto seedlings broke surface.

Materials used:
1. Jiffy pellet for growing seedling (will slot it into the growing medium later)
2. PC fan blowing 24hours
3. Temp around 30 degress Celsius.
4. 5w LED 5 cm away from top: gives about 160K of lumen
5. Watering only when the pellet feels dry on the sides
6. Compost tea, worm cast, seedweed as nutrients

On the fourth day, i decided to add another LED, so it has 2 5w LED 5 cm away from the top, and the every next morning, i find it growing towards the side, towards the side with less light coverage.

So i am thinking, is this light stress on seedlings?

Appreciate your assistance. Edit: sorry, forgot to turn the light off in the photo
 

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Last edited:
rob333

rob333

Well-Known Member
JuanJadinero said:
Hellow fiends, this is the fifth day my auto seedlings broke surface.

Materials used:
1. Jiffy pellet for growing seedling (will slot it into the growing medium later)
2. PC fan blowing 24hours
3. Temp around 30 degress Celsius.
4. 5w LED 5 cm away from top: gives about 160K of lumen
5. Watering only when the pellet feels dry on the sides
6. Compost tea, worm cast, seedweed as nutrients

On the fourth day, i decided to add another LED, so it has 2 5w LED 5 cm away from the top, and the every next morning, i find it growing towards the side, towards the side with less light coverage.

So i am thinking, is this light stress on seedlings?

Appreciate your assistance. Edit: sorry, forgot to turn the light off in the photo
Click to expand...
Im missing something here 5 w led with 160k lumens what a led light
 
JuanJadinero

JuanJadinero

Member
rob333 said:
Im missing something here 5 w led with 160k lumens what a led light
Click to expand...
Ah the calculation is like this: (Distance1/Distance2)^2 x Lumen1 = Lumen2

Distance1: 100cm/1m, the standard distance from which the lumen of a lighting running at full capacity is measured
Distance2: the distance between plant and lighting
Lumen1: the official lumen of a lighting
Lumen 2: the lumen received by the plant

So for my case: Lumen2 = (100/5)^2 x 400
Lumen2 = 160k

Of course it's all just an estimate, but should be a pretty good one.
 
rob333

rob333

Well-Known Member
JuanJadinero said:
Ah the calculation is like this: (Distance1/Distance2)^2 x Lumen1 = Lumen2

Distance1: 100cm/1m, the standard distance from which the lumen of a lighting running at full capacity is measured
Distance2: the distance between plant and lighting
Lumen1: the official lumen of a lighting
Lumen 2: the lumen received by the plant

So for my case: Lumen2 = (100/5)^2 x 400
Lumen2 = 160k

Of course it's all just an estimate, but should be a pretty good one.
Click to expand...
I no how to work out lights I think u got 160 lumen with 160k kelvin
 
JuanJadinero

JuanJadinero

Member
rob333 said:
No way a 5 w led is pushing out 160k when my 600 HPs does 68k lol
Click to expand...
Ahh simple misunderstanding, 160k i refer to 160,000 lumen, not 160kelvin, i am perhaps too lazy to type that extra 3 zeros.

Edit: both 5w LEDs are 6500kelvin @ 435lumen (which round to 400)
 
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JuanJadinero

JuanJadinero

Member
Thanks for all the replies friends. The seedling got me worried there. Today it is still slightly bent, but its stalk grew about 4mm, so i think it is still healthy.

I have no idea what cause that ugly bent, but here is what i did:
1. I raised the 2 5w LEDs to 10cm away
2. I overwater until there is runoff and dry the pellet with a tissue, so the pellet is not soggy
3. I left the lightning off while away for about 6~8 hours

I have no idea which of the above helped but it is not bending as much today and I wasn't prepared to change one variable just to experiment; this seed is a precious one. So is it light stress or underwatering or just that seedlings need some darkness? I have no idea...
 

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rob333

rob333

Well-Known Member
JuanJadinero said:
Ahh simple misunderstanding, 160k i refer to 160,000 lumen, not 160kelvin, i am perhaps too lazy to type that extra 3 zeros.

Edit: both 5w LEDs are 6500kelvin @ 435lumen (which round to 400)
Click to expand...
Sorry man but that's utter bullshit 5w led pushing 160k lumens I have heard some shit in my time but this is just retarded
 
JuanJadinero

JuanJadinero

Member
rob333 said:
Sorry man but that's utter bullshit 5w led pushing 160k lumens I have heard some shit in my time but this is just retarded
Click to expand...
Oh no rob, did you not see my calculations? From my calculations, i will be getting 160,000 lumens to my seedling due to the distance.
 
Nadia786

Nadia786

Active Member
Hello,
Can you post a pic showing plant leafs color and growth tip better and your led set up?
Leds are powerful and needs to be kept much higher...So buds tend to develop airier but with more resine
 
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