I always hang the lights in the range recommended by the manufacturer and dial on DLI with the dimmer. Don’t measure DLI separately for each light. Measure it at the canopy level all together. I hang my UV bar beside (parallel to) the main light.
I am using two sets of ACInfinity IonBeam S-16s in a 3x3 tent. Since they are new there was not much information about them when I ordered them. I’ll be happy to share what little I know about them.
I have one ILGM Chocolope plant in the 3x3 tent. The Chocolope is a tall growing strain so is a perfect plant to try out side lighting on. I didn’t do as aggressive of lollipoping to this plant as I usually do so it will be interesting seeing if side lighting helps.
I started with the controllers that came with the IonBeams but found it easier to have them come on with my other lights so I bypassed the controllers I use them at 100% all the time. I have an Apogee meter for measuring the light intensity and as I recall, their PPFD is around 500 at 6 inches distance. Not enough to harm a plant that grows even closer or makes contact with the light. I’ll check the light intensity in a couple days when I get home to confirm.
The “extension” cords that come with the light are not very long so I doubt they will reach to put one in each corner pole even in a 2x2 tent. Thats why I bought a second set, so I could spread them evenly around a 3x3 tent.
I’m not sure the lights would be of much benefit until your plant gets bigger and grows closer to the sides of the tent.