If those lights had enough intensity to flower your NL's well I would say start with the lights flower coverage listing. If they claim a footprint in flower of 2X2 for each light, I think you're good. If they are less than 2x2, consider adding the 3rd light. You'll get good coverage for sure and will be able to overlap them probably. Other factors are heat and electric costs, although small LEDs usually aren't much of a issue there. I've seen people add a small HPS, like 150W in a case like this too. 2, 300 LEDs and 1, 150W HPS can be a nice combo and probably similar cost to purchase. Comes right back to heat in this case. If your space needs heat in the colder months, like in a basement, the HPS can heat up your tent while supercharging flowering. Good Luck!
