What do you think I should do?

In three weeks I’m gonna start flower in my grill. Right now I’m using one of two lights that I have. One is a 720 W creative light in one is a 600 R spec HLG. One of the plants I’m going to flower is my mother, do you think I should put my second light in here and just flower my mother plant underneath it by itself. I think it’s a little overkill but the plant comes up to my chest and I am 6 feet tall so it’s about 4 feet tall. I was thinking about putting the second light in here and putting that plant in its own little corner and turning on that light and just seeing what happens. It’s in a 15 gallon pot, I have four in 5 gallons and 7 in 10 gallons.
Don’t ask why they’re all different, had a change of plans. What would you do?

I would scrog the tall one down to even the heights out or plastic(not bamboo) steaks to open it right up. Good looking plants