high pressure sodium bulb is what hps stands for. also, no need to "mist" plants. no reason to have water on leaves of plant. water soil, and you'll be good. anything completely dead on your plant should be removed, but ONLY the portion that is dead, not entire leaf. unless of course the entire leaf is dead. your 2' plant probably isnt very bushy due to stretching. the plant was stretching to reach the available light, and thus ended up not being very lush. move light closer to plant if possible, or add additional lights. looks like you got her in a 5 gal bucket, which is very good, as a large root system will result in a better, higher yielding plant.

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Fck the world and the government, OVERGROW em' all !