autos = autoflowering. They were low riders so yield per plant wasn't great but hey they finished quick and you can grow a shitload in a small space. Your yield can be determined by many factors. Light, soil, temps, PH of water etc. You should be fine but if your concerned get bigger CFL's. I use the 42 watt ones and love them. These are my girls with 6 42 watt bulbs on 3 plants there all heavily LST'd.