Indeed, I have heard of the technique! One can either do this, or one can do supercropping via snap stress at the internodes. The results tend to be the exact same.
Your idea would work but you'd likely need one on both sides, depending upon the loss of air speed as the wind whips round from the deflector. It might be easier to raise the little fan up and just point it diagonal into the canopy, as the leaves will pretty much do the same thing as your deflector ...
I worried about this. LEDs accelerate growth so rapidly that growth can become extremely thick, and create high humidity spots. Black tips are a sign of moisture-induced damage, and can signal mold (which is truly impossible to avoid, anyways. It's present even if it never produces a fruiting body.)...
You are going to find that good pictures with green-negative grow lighting are a major pain in the ass to accomplish. You will need either a powerful flash or perhaps something that can switch the LEDs off and turn on a couple of strategically-placed fluorescents for a better picture, mylar or not. ...
So I checked the pH of the reservoirs. All of them flat neutral. Poured out the remaining solution, or should I say, water (all nutrients absorbed, even the color of the nutrient solution had gone back to being clear.) Skipping straight to aggressive veg for the larger two, with roughly half that do...
I had a great one, thank you! Got myself some nice kitchen gear.
You know what's funnier? I haven't even checked the pH. I'm going to do that before the water change. I don't think it changed much since I used a very light nutrient solution. I shall see!