I have 3 W.R. from Serious Seeds, in a Bubbleponics setup (1 pre-fabbed unit, 1 homemade) with a Blue Widow and two Delahaze, 6 feminized plants total.
400W HPS, two 1.5' fluorescent tubes and one CFL, totaling about 52,000 lumens. It's all crammed into a meter-squared closet with adequate...