eh bro zip tie your lights together like I did look
pic 1 zip tied
pic 2 flowering same plants 3 weeks later.
Also run a fan to strengthen your stems for supporting heavy buds. Once you have a fan put the lights 2 inches above the plants so you don't get a strech
There is a fan, and the roots wont have issues unless they grow to the edge of those containers where light can hit them. So just move them soon into 5 Gal buckets or whatever your going to use. Also drop/increase the lighting.
(The light issue is partially why you use Styrofoam cups but even they are not 100% light proof.)