I also use the 315 LEC, pretty much 3 or 4 plants is more than enough for one light, I have found that if you veg a little longer and properly trained one or two plants per lights all you really need. Much easier to take care of less watering less maintenance same yield. Think of it as the light being food and if one plants only getting a little bit of like you're actually starving that plant for what it needs. Good luck ☮ï¸