At 53 years old I have been a legal medical marijuana user for three years now. Also take Marinol for wasting syndrome and central nervous system relaxant. Finally got around to getting set up for growing. Am using 1000 watt Halide. Clones started under flourescent light first month or so. Plants around three months old. Was on 24 hour, but went to 12 and 12 when bud hairs started forming. Been under 12 hour for about a week now. Good bud distribution throughout lower part of plant. Plants only 18 inches tall, but bushy. Have already cloned out center stalks. Not sure which leaves to prune for maximum output. Any help for this rookie?