One light or two lights will work. Either setup will provide adequate light for growing. One plant per sq. ft. is great. I've used the liquid light during veg. for the past two weeks. Can't see a difference between those sprayed and those not sprayed. Will be transplanting this weekend and I'll check to see if those sprayed with liguid light have more root development.

I've also been running some of my vegging plants with a new product called 'Vermablend". This company was selling setups to hydro shops to brew their own 'tea'. It never got off the ground because the tea had to be used within a day or two and you can imagine the headaches of no shelf life. Customers would have to come in on a certain day so they could use it on schedule. Anyway, this new product comes in a bag as a soil amendment. Suppose to offer the same benefits as the tea. I'll check root development this weekend to see if any difference in the plants using this product.