You obviously haven't grown with LED. And you obviously don't know about IR either. Infrared is totally unusable by the plant it just heats up the surface of the leaf hid and CMH and fluorescent all have IR LED without separate IR diodes has none. So therefore any type of light with ir will make a warmer leaf surface temperature. And for proper VPD measurement you measure the leaf surface temp the air temp and the relative humidity. Trying to troll when you don't know what you're talking about is hilarious.
