Wow it's great to hear that there are more knowledge hungry people on the board that are intelligent enough to read up and study cultivation also!!! I can't stress book knowledge enough. 42w CF bulbs are great to work with. I have to recomend the bulbs I am using though, even though HvyFuel will probably read this and type some wonderful response. lol go to www.ozonelamp.com these bulbs are by far the best CFs on the market. Anti-odor, bacteria, fungus, full-spectrum, 3400 lumen, CO2 producer. Check them out. Okay HvyFuel I'm ready for your post.