I did not actually downgrade the lighting. If you read my post you would see that for the size of my growing are the 200 watt cfl provides more than enough light and the Kelvin temps are right about where they ought to be. The 250 watt HPS I tried using before got the stand up closet I use too hot, about 82 degrees F. Plus I would have to keep the light further away meaning I would have to grow smaller plants. Since I grew'em bigger than average, about 5' to 5'-6" high (measured from soil top to cola), I get around 4 oz. a plant plus or minus a few grams. Since it is only one plant odor is not much of an issue and can easily be masked. No problem with ventallation as it stands right now. I was looking for more info about nutrients and ec/ppm meter.