MIhomegrown
Member
Thank you for the info ibchilling. My lights are an optimal distance away they're just strong and I don't want to raise them. I don't have signs of leaf stress or burning. Thankfully my a/c runs more than it does when it's off. When's it running the lst are what i like to see. Also why do you prefer to have a 88F leaf temp and what temps do you prefer in your rooms?I follow what your saying MIhomegrown, ideally for optimal growth you would want to maintain the 88F leaf surface temperature during lights on, and there are a few things that influence leaf surface temperature other than room temperature. Like Switcher56 Mentioned distance from your light source has a major influence, as well as the spectrum of the light.
From what youve told us it seems when you A/C is off the environment is optimal during lights on to maintain 88F leaf surface temperatures, maybe try setting the a/c thermostat a few degrees higher so it runs for less time?
From Black Dog Led Leaf Surface Temperature Study:
When a photon of light hits a plant leaf, it can either be reflected or absorbed. Reflected photons will not affect the leaf temperature at all, but physics dictates that all photons absorbed by the leaf will increase the leaf temperature; how much depends on the energy (wavelength) of the photon and whether or not some of that energy was used to trigger other chemical reactions, such as photosynthesis. Photons fully utilized by the plant in chemical reactions will heat the leaf less than photons which are absorbed but not utilized. Therefore, measuring leaf surface temperature indirectly measures the efficiency of the light spectrum for growing plants-- less-efficient spectrums will tend to heat the leaf more, while more-efficient spectrums will heat the leaf less as more of the light energy is being converted to chemical energy.