Thanks Hemp goddess, I checked last night an my lights are the old, inefficient t12s. Is there any way to practice growing without wasting time, or should I just wait, it just sucks cuz I've already gotten the plants this far, just to pull them out. Plus if I learn to grow CFLs won't HIDs be easier to use since I'll probably only need 1 about 400w. What about the extreme amount of heat they produce my attic is colder right now but if I get an mh for vegging and an HPS for budding/flowering will it warm up my grow area enough( its about 60-65f) What about ventilation can I just use a dual exhaust fan that can exchange old and new air at the same time?