led environmental question

Z

Zappa66

Well-Known Member
Right now I have ambient temperatures around 78-80f, humidity fluctuating at 55-60, and leaf surface temps at around 73f.

space is a 4x8 tent with four fissioning board type fixtures. Have them dimmed to around 200w over each 4x4 side of the tent at around 36” inches off The canopy.

my question is what seems to be working for people regarding temp/rh/leaf temp as I thought I was in the proper range but the plants are not looking 100% happy. Under the 150w hps in my veg tent they were happy as can be. After 5 or 6 runs I still can’t nail my board grows.

so far what I have learned is to keep boards dimmed way down till flower (under 30w per sr foot), supplement with Epsom salts And keep temps as high as I can.

here is my current crop of icy hot x mighty freeze clones (pardon the re vegg looking leaves, this mom likes to try to flower when clones are taken and you kinda have to bring them back along).


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coreywebster

coreywebster

Well-Known Member
Your air temps are a bit low but in direct light I assume given your thermometer placement , so in real life they are probably lower than what you think.
That would explain why your LST is a fair chunk lower than your air temp.

Place your thermometer under card( to shade it) or out of direct light, up your real air temps to around 80-82f and that should bring your LST up, it wants to be a few degrees higher, 77-82f range.
 
Rocket Soul

Rocket Soul

Well-Known Member
coreywebster said:
Your air temps are a bit low but in direct light I assume given your thermometer placement , so in real life they are probably lower than what you think.
That would explain why your LST is a fair chunk lower than your air temp.

Place your thermometer under card( to shade it) or out of direct light, up your real air temps to around 80-82f and that should bring your LST up, it wants to be a few degrees higher, 77-82f range.
Click to expand...
I agree, those plantsare getting too much light with not enough heat.
 
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