400 watt 10 inches away... should not cause stretching at all and nutes, I beleive, have no impact on this behavior. I have heard that stress can cause a plant to stretch like crazy. You may want to look into that. Otherwise it's an indica dominant strain and should be shorter and bushier, if it was sativa... well even then that couldn't explain that kinda stretch, even in flowering. Good luck on figuring your issue out ~ BCbuddy