She looks pretty well. so many trichomes.
Is there a Maximum "safe" ppfd??
- Thread starter LostTribe
- Start date
She looks pretty well. so many trichomes.
Personally I have found the same, 1000 plenty, even 800 will do. But I do think with better environment and feed, and co2, a bit more could be used. But I do see that once I get a mild deficiency, it's more easy to treat it if I reduce lighting while I do that, rather than leave the light to intense or even add more power.
What is your recommended height and power setting for the vegetative phase?
the recommended height is 24-30 inches, power is 50% for vegging phase.
I think the website says 25% at 12 inches? Which is better? I am having a difficult time vegging with LED. My seed starts under simple shop T8's are growing at twice the rate of the LED clones. Temp is too low but the T8's are close to the plants so they are at an advantage I suppose.
The fce4800 did fine in veg but my mom/veg light is 2 quantum boards lm301h and osran 660nm dialed all the way down getting 4-500ppfd. Temp wont go over 72F. Considering putting my hps back to veg for the temps. Got to figure this out quick need the resets ready for the fce4800 in about 2 weeks no time to dilly dally around!!
What would you guys do go back to HPS (400 dialed to 150w) or keep messing with the quantum board?
I pulled the HLG 260w out and replaced it with my 400w HPS dimmed to 200-300 to see if that will help. I dont fancy the idea of having a plug in heater anywhere when I am not present, just dangerous. This is one issue I just don't know how people deal with with LED.
The plants have to have a warm environment especially the root zone to survive cold months. Will keep an eye on the veg and see how the fce4800 does once that tent gets reset.
The plants have to have a warm environment especially the root zone to survive cold months. Will keep an eye on the veg and see how the fce4800 does once that tent gets reset.
25% at 12 inches is also possible. but pay more attention on the plant leaves at that distance.
It is better to keep the light spectrum the same in a room. or separate into two rooms. The growing way is a little different.
Sampas92
Just newbin
I dial it like the way you dont want, a heater pluged in a controller.
Some guys use pc fans depending on the design of the lights to push down the hot air, play with the drivers position and their temp.
Halogen lamp in conjunction with leds.
Twicking the rh because vpd
Different ratios of nutrients due to how much leds push them, different needs because of how the lights give them light in the different stages and how that also affect the soil regarding ph drifting etc etc etc
I was going to say running them on the lower side of power but since you manage ppfd i shut up.
I started growing 2 years ago, i make a bunch of mistakes, im a newb honestly like you can imagine.
But i read about growing by some years now, saw leds emerge like you, how they developed and how people strugled and strugle.
Thing is i started with leds, so i have no background of hps experience and habits, so i searched only in led aspects.
I started with sils and the advantage was i could play with different spectrums, 4000k they are the most healthy looking plants in veg and flower when compared with the warmer or colder side, that combined with soil buffering and not soiless mixes, coco or hydro helped and when i changed some light to different spectrum i could clearly see differences on the closer tops on how they develop and display themselves.
AGAIN, im a newb, but i like to think and talk, healthy discussions are good.
Peace
Fitzera
Well-known member
In the winter I have no choice but to run extra heat using the qb. Otherwise my tent is maybe 17c and leaf temps even worse. I have an inkbird controller because I don't trust the heater thermostat. Once the plants get larger than the footprint of the light, I yank the heater and add my 600w hps. My hps is in a cool tube and the extraction for that is set on the same timer as the light. Without extraction the tent gets to be 29c, with extraction on it hovers between 24-25c. I run it on the timer to let the heat radiate when the light shuts off to slow the cooling during lights out.
Well the battle is real. HPS dialed up then down then middle now back down and fired up the humidifier but it has to be refilled daily. I dont think it shuts off just 2 setings...
temp acceptable on light setting and RH better but not within proper vpd range.
No way to veg with the qb for this setup just not this one. Just trying to get them ready for the other mars tent was hoping they wouldnt need to veg by then.
temp acceptable on light setting and RH better but not within proper vpd range.
No way to veg with the qb for this setup just not this one. Just trying to get them ready for the other mars tent was hoping they wouldnt need to veg by then.
Fitzera
Well-known member
Yeah its tough hey. Luckily I run blumats and been using bags when theyre big enough so there's enough humidity at that point. Humidifier is a pain in the ass...ive got a big one but it takes too much space and it's either 60% or 100%. And then the small one I've been using has to be filled too often for my liking. I use an inkbird for the humidifier too cause like you it's either on or off.
some commercial grow guys would like to use them together.
There really exit a risk. respect for the courage. 
I think I'm gonna run LED in the summer, but I have been really happy with my 630 CMH for winter time. I don't have to run heat at all. Only extraction.
I was curious about many of the factors mentioned here.
Very good info.
I use 8 bulb x 4' T5 in my veg areas
I was curious about many of the factors mentioned here.
Very good info.
I use 8 bulb x 4' T5 in my veg areas
