Andy
- 122
- 43
Hi all,
I've been growing successfully for years & get a consistent 1g per watt. However, I use a lot of light intensity - about 1000W of HPS lighting per square meter, with no CO2 enrichment. I have a lot of extraction power and the canopy is kept cool enough (no higher than 27 degrees. The buds look great when harvested.
However, I'm on a mission to increase flavour - is it possible that such a high light intensity could be reducing the flavour/terpene potential of the crop, even though temperatures are fine?
Hi I did have a run where I had a 600 Hps in my 3x3 x6 tent and a 400 Hps in the other same size tent , both at 36” above canopy both crops NL#5 600w tent flavour was half as good as the 400 w I got another 400w light and retired to 600 w , so yes I think yes it dose play a big part along with the heat as stated above .
Yep good idea I’m thinking of stripping down the 2 tents and building out a room in the shed so I can just run the 600w I’ve got 2 m wide x 1 m deep x 1.9 m High the 600 would look after that size space with 6 plants under it . Od .That sounds about right if you dont “work” the more powerful light. Not much talk about this but more light intensity can mean more potency along with yield. My weed has been stronger under 2 600’s than it was under only one. I adjust the height of my plants under the fixed lamps often.
Yep good idea I’m thinking of stripping down the 2 tents and building out a room in the shed so I can just run the 600w I’ve got 2 m wide x 1 m deep x 1.9 m High the 600 would look after that size space with 6 plants under it . Od .
I found running higher sulfur the last few weeks to help with terps and flavonoids this round I'm going 48 dark at the end on the grow. Haven't thrown into the whole grow yet but thinking about it
I also feel heat is likely the number 1 culprit
Cool I noticed a little foxtailing on my NL #1 I had about 2” left to raise up the 400 w Hps so I’m at 39.5” above crop and heat has dissipated down to 28 deg c foxtailing has seemed to back off , I’m so close to harvest I’ve even got my shade cloth ready for the last week or so of flushing don’t want all this hard work go to waste flavour wise . Od .I found running higher sulfur the last few weeks to help with terps and flavonoids this round I'm going 48 dark at the end on the grow.
I also feel heat is likely the number 1 culprit
I could run the 400 together then have a better spread of light over 6 plants is that a better way for me to go . .I use 2 600’s for that space with 6-7 plants. One will only flower 3.5’x3.5’ maybe 4x4 in a reflective tent to potential in my experience.
Cool I noticed a little foxtailing on my NL #1 I had about 2” left to raise up the 400 w Hps so I’m at 39.5” above crop and heat has dissipated down to 28 deg c foxtailing has seemed to back off , I’m so close to harvest I’ve even got my shade cloth ready for the last week or so of flushing don’t want all this hard work go to waste flavour wise . Od .
I could run the 400 together then have a better spread of light over 6 plants is that a better way for me to go . .
Cough* LED Cough*In glass enclosed air cooled reflectors i kept my 400 at about 12” and 14” for ripening. And 18” to 22” for my 600’s.
I use plenty of ventilation to maintain these heights. Even a few inches farther and yield and quality suffer a lot.
Yield isn’t such a big thing with me and my wife I’m getting better yields with the old bat wing open light defuser keeping the height up at 36” and above if I can squeeze the light right to roof of tent then I have with light at 18” to 24” even with 2 fans tilted up across canopy . Od .In glass enclosed air cooled reflectors i kept my 400 at about 12” and 14” for ripening. And 18” to 22” for my 600’s.
I use plenty of ventilation to maintain these heights. Even a few inches farther and yield and quality suffer a lot.
This sounds sensible, and would mean you can get the 600 to the right distance (18-22”) without that intense blanket of heat forming at canopy level. Others examples of 36” height for a 600 HPS would be too high for me as I don’t want to sacrifice yields.In glass enclosed air cooled reflectors i kept my 400 at about 12” and 14” for ripening. And 18” to 22” for my 600’s.
I use plenty of ventilation to maintain these heights. Even a few inches farther and yield and quality suffer a lot.
There will be a learning curve to it but imo I think LED is at a place now where it is more than comparable. But it does provide it's challenges and does benefit from other supplemental lighting for spectrum imo. But so do other light sources.This sounds sensible, and would mean you can get the 600 to the right distance (18-22”) without that intense blanket of heat forming at canopy level. Others examples of 36” height for a 600 HPS would be too high for me as I don’t want to sacrifice yields.
But surely considering the confirmation from everyone here, the ovbious choice for me now is to go 100% LED no?
This sounds sensible, and would mean you can get the 600 to the right distance (18-22”) without that intense blanket of heat forming at canopy level. Others examples of 36” height for a 600 HPS would be too high for me as I don’t want to sacrifice yields.
But surely considering the confirmation from everyone here, the ovbious choice for me now is to go 100% LED no?
Definitely a bigger upfront cost. Much biggerI guess if you got the cash.
Definitely a bigger upfront cost. Much bigger
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