Hey guys I've been growing for a few weeks now with two plants under a 400 watt metal halide bulb. I have already bought a HPS Bulb for when it starts flowering. Seems like I'm doing something wrong? The plants haven't been getting much taller and been keeping lights for 18 on and 6 off. Seems like the plant is getting wider not any taller. Growing some "Northern Lights x Big Bud" and some "Phat Elvis" but not sure what to do? If someone could give me advice for now and later on would be great!! the plant doesnt want to get taller just wider is this good or bad?