Hey! I'm using an 90W UFO LED too, for a 0,6x0,6x1,5m grow space.
With this I right now have 3 autoflowers but am also thinking of buying another 1 or 2, totalling 180-270w
because I have so much bush, so I'd need at least two light for 3-4 plants, for it to penetrate fully.
LED's plus is also...