Im trying to setup a growing station indoors and I was wondering how many lumens would be required by VFT's to grow healthily.I was considering using 4 shop lights suspended above a 4 ft by 4ft area using a total of eight 40 watt cool white fluorescent lights producing approx. 12480 lumens in that area.Or would I have to go with a MH bulb of at least 400 watts creating approx 40,000 lumens.Any advice would be of great help.Thank you.