Correct temperatures with leds

Have2

Have2

Well-Known Member
NukaKola said:
80-85F. 85-88F if supplementing CO2.

It’s the leaf surface temp that matters.

HID lights produce lots of infrared and radiate heat downwards so the leaf surface temp is usually a few degrees hotter than the ambient air temp, which is why people run ~78F under HID lights.

LED’s radiate most of their heat upwards which is why you want higher ambient air temps to keep the leaf surface temps up.
Click to expand...
And what would be the leaf temp if the room temp is 85-88?

My leag temp is 70-72 and room temp was 81-82... :/
 
NukaKola

NukaKola

Well-Known Member
Have2 said:
And what would be the leaf temp if the room temp is 85-88?

My leag temp is 70-72 and room temp was 81-82... :/
Click to expand...
Yeah not sure why your leaf temps would be so low. My leaf temps are usually only a few degrees lower than my ambient temps.
 
Have2

Have2

Well-Known Member
NukaKola said:
Yeah not sure why your leaf temps would be so low. My leaf temps are usually only a few degrees lower than my ambient temps.
Click to expand...
Are you in soil or hydro? I'm in hydro, water temp at 68, maybe the reason? Just took few more readings... LST at 73, ambient temp 82. Will try to raise ambient temp a bit and see how it goes. :)
 
PJ Diaz

PJ Diaz

Well-Known Member
Have2 said:
Are you in soil or hydro? I'm in hydro, water temp at 68, maybe the reason? Just took few more readings... LST at 73, ambient temp 82. Will try to raise ambient temp a bit and see how it goes. :)
Click to expand...
Low humidity? Perhaps the stomata aren't opening enough for ideal transpiration.
 
You must log in or register to reply here.
Top