Is there a general rule of thumb when it comes to light/Klein/watts/lumens to space ratio? I've read some posts on here and I'm not sure I understand it completely. My grow room is roughly 4'x8' with 7' ceilings and I have 6-32 watt, 6500k t8ho, 4ft tubes, and 12 40 watt, 6500k cfl's. And then I plan on using the same fixtures and amount of bulbs but with 2700k come flowering time. Does this work?