Well sure you could but your overall harvest will suffer. Using those lights is like joining a Nascar race with a scooter. Sure you can finish the race but you're certainly not coming out on top. Me personally if I only had 2 300 W lights, I would only grow 2 plants max.Okay! I have 4 GSC’s do you think i can do 4 of them with both of the 300watt lights? And could the 4 plants let me do a SoG?