I've been growing a sativa plant like this for a while now. The manual for my grow light said not to run it for more than 10 hours at a time, so I decided to break up the light schedule to a 6-6 hour schedule so as not to overwhelm the grow light. The plant has been growing a lot, but I can't get it to start flowering. It just keeps growing. When it was young it was really bushy but now it's a lot more stretched out like it's reaching for the light, but I have a 600W in a less than 2 ft grow space and it's closer to the lights than it probably should be. Some of the branches have an even number of leaves which is weird, but most of them are fine. A lot of what I've read people are suggesting that this will cause the plant to be a hermaphrodite, but I can't tell you because I can't get it to flower. I wish I could find someone whose successfully grown a plant this way, but I can't.