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I was puzzled by the comment about light intensity. Seems from the article that you linked to that the increased VPD at higher light temperatures is due to higher leaf temperature, which would likely be true with non-led lights, but perhaps less so with LEDs. It seems to me that light intensity itself is unlikely to change VPD much if at all because adjusting led light level either by lowering lights or altering ballast setting will not change leaf temps much. IMO you are much better to adjust lights to best levels independent of VPD, and deal with VPD by changing RH or air temperature.Deceasing the temp, raising the RH, and increasing the light intensity can all lower your VPD.
The Ultimate Vapor Pressure Deficit (VPD) Guide
"Why devote an entire guide to VPD?" you might ask. The answer is that the vapor pressure deficit (VPD) is extremely important for growing plants. VPD helps you identify the correct range of temperature and humidity to aim for in your grow space. With VPD you can achieve the best results while...pulsegrow.com
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