Problems with LED vs. CFL

tightpockt

tightpockt

Well-Known Member
I have two Veg spaces and recently converted one of them from CFL to LED using vero10's @ 350ma, 5000k @ 8" and I'm noticing my fan leaves are tuning yellow and overall health of the plant looks poor. Is there an issue with LED that I don't know about? Do the plants use a different nutrient profile under the new lights? Under cfl everything is lush and green....
 
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smowstack

Active Member
tightpockt said:
I have two Veg spaces and recently converted one of them from CFL to LED using vero10's @ 350ma, 5000k @ 8" and I'm noticing my fan leaves are tuning yellow and overall health of the plant looks poor. Is there an issue with LED that I don't know about? Do the plants use a different nutrient profile under the new lights? Under cfl everything is lush and green....
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unlike your cfl which can be kept a few inches above the canopy, my led needs to be about 18 inches above or it will start bleaching leaves. But nothing is ever going to look lush and green under an led, even if it is,
 
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deadgro

Well-Known Member
tightpockt said:
I have two Veg spaces and recently converted one of them from CFL to LED using vero10's @ 350ma, 5000k @ 8" and I'm noticing my fan leaves are tuning yellow and overall health of the plant looks poor. Is there an issue with LED that I don't know about? Do the plants use a different nutrient profile under the new lights? Under cfl everything is lush and green....
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You may have to adjust your nutrients, plants grow differently under LEDs, start upping your nutes.

smowstack said:
unlike your cfl which can be kept a few inches above the canopy, my led needs to be about 18 inches above or it will start bleaching leaves. But nothing is ever going to look lush and green under an led, even if it is,
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He's not using red and blues.
 
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az2000

Well-Known Member
A photo would help. Mg def seems to be a common complaint from people converting to LED. Could be too close and bleaching the leaves. Is it only the top leaves?

If I were going to replace CFL, I'd use the Cree LED lightbulbs from Home Depot. Seems like a direct replacement with 30% more efficiency. With COBs I'd be concerned whether they're driven soft enough that they can be CFL distance (if you can't manage more distance).
 
tightpockt

tightpockt

Well-Known Member
az2000 said:
A photo would help. Mg def seems to be a common complaint from people converting to LED. Could be too close and bleaching the leaves. Is it only the top leaves?

If I were going to replace CFL, I'd use the Cree LED lightbulbs from Home Depot. Seems like a direct replacement with 30% more efficiency. With COBs I'd be concerned whether they're driven soft enough that they can be CFL distance (if you can't manage more distance).
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At 26vf x .350a = 9.1w per cob.
It actually looks like a mg deficiency, why would led make my plants prone to mg deficiency?
 
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churchhaze

Well-Known Member
I personally think the key is iron. Iron is used in the production of Ferredoxins proteins, used in photosystem I electron pump thing.

I think that under high levels of blue, or intensity, or something... more PS1 is produced by the plant, which requires more food. (this is just a guess)



It could also be that your veg lamp is simply too powerful.
 
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tightpockt

tightpockt

Well-Known Member
REALSTYLES said:
Haha I know how to fix that but you chopped your dick off in my thread. I use to grow for a dispensary. I handled over 200 plants and 300 clones. I'm not a troll I'm a Gargoyle.
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WHO THE FUCK CARES?!?! You've mentioned how you worked for a dispensary like 1000000000 times when nobody even asked.
So again...WHO GIVES A FUCK?
 
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Tazbud

Well-Known Member
Rusty Water foliar sprayed.
Iv'e not pinned it down, generally more hungry, sulphur/mg def or iron.. One of the three fixed my last run ; ). It's definitely evident in sunlight V LED. Before I tried Calmg and Epsom with the odd worm juice tea, It did come around but not nearly as quickly. I suspected it was more the tea so this time tried a broad organic fert supplement (and iron spray).. something in there (other than cal or mg) worked!.
 
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tightpockt

tightpockt

Well-Known Member
REALSTYLES said:
you haven't read anything I've started and you have just made yourself look like a fool. Click on my sig's and you'll see.
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Ugh...you're so fucking stupid it's almost a shame. This thread was created asking if plants grow differently under LED's and if there are any known deficiency issues and if so why. Now either you have some info or you don't. It seems like you don't (you never do) so just bounce and troll elsewhere.
Btw..Just got an email from jerry at kingbrite and he said your head game was mad good...you don't be gagging or nothin'!
P.S..just for clarification...did you work at a dispensary?
 
tightpockt

tightpockt

Well-Known Member
So my hot water heater should have a magnesium diode in it, which makes me think the mg content in my hot water should be higher. I'll try feeding or foliar spraying with that to see if it helps. If not I'll go the calmag route.
 
REALSTYLES

REALSTYLES

Well-Known Member
tightpockt said:
Ugh...you're so fucking stupid it's almost a shame. This thread was created asking if plants grow differently under LED's and if there are any known deficiency issues and if so why. Now either you have some info or you don't. It seems like you don't (you never do) so just bounce and troll elsewhere.
Btw..Just got an email from jerry at kingbrite and he said your head game was mad good...you don't be gagging or nothin'!
P.S..just for clarification...did you work at a dispensary?
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Yep I'm stupid and you're about to use hot water for Magnesium and don't know what's better than Calmag I'm laughing really hard right now. I know the fix and it would only cost 99 cents lol.
 
tightpockt

tightpockt

Well-Known Member
REALSTYLES said:
Yep I'm stupid and you're about to use hot water for Magnesium and don't know what's better than Calmag I'm laughing really hard right now. I know the fix and it would only cost 99 cents lol.
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Once again...a totally useless post by realcryles
 
hyroot

hyroot

Well-Known Member
tightpockt said:
Why? Have a source? Not being a dick, just want to know. I tried researching didn't come up with much
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fuller spectrum. All pigments are being used.

cfl has tri phosphor spectrum only spikes at 3 points. Various pigments go dormant since those wavelengths are not present. Under white led all wave lengths are present.. So all pigments are absorbing and processing light.
 
tightpockt

tightpockt

Well-Known Member
hyroot said:
fuller spectrum. All pigments are being used.

cfl has tri phosphor spectrum only spikes at 3 points. Various pigments go dormant since those wavelengths are not present. Under white led all wave lengths are present.. So all pigments are absorbing and processing light.
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Word. That's what I'm looking for. Even though my CFLs and LEDs are both supposed to be 5000k you can definitely tell that the CFLs are a warmer color. The LED's are crisp and brighter.
 
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az2000

Well-Known Member
tightpockt said:
So my hot water heater should have a magnesium diode in it, which makes me think the mg content in my hot water should be higher. I'll try feeding or foliar spraying with that to see if it helps. If not I'll go the calmag route.
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I didn't understand that. Water heaters have what is called a "sacrificial anode" which will erode before the tank's steel liner. I don't believe it erodes at a rate that it would provide significantly more mg than your tap water would have in it anyway. (The rod could be aluminum, not magnesium too.).

If it were me, I'd spend $2 on a pound of epsom salt at the drug store. Use 1/4 to 1tsp/gal nutrient solution depending on severity of mg def. It will last a decade at that rate of application.
 
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