Quote Originally Posted by zendai
according to http://www.erowid.org/plants/cannabi...rowlight.shtml a good grow room needs 1000-3000 lumens per square foot
That is total bullshit. I have about 7,000 lumens per square foot in my grow box and that is nothing to be proud of. The bottom line is, watts = grams. You will get between .20 and .40 grams of finished product per watt using fluorescent lights. With HPS you can expect between .5 and 1 gram per watt.

Quote Originally Posted by zendai
I don't reckon you know what you're on about mate.
I have a degree in lighting and electrical science and successfully grown quite a bit of weed indoors. Have you?