get rid of ur halogen bulb completely. your plants ahve to get reall close to it and once they r close enough to get any bennefit from it it will cook them. try repotting and burrying ur stems a little, moving the floros closer and get more floros or lights(just not halogens or regular bulbs, floros or hid's). even if ur nodes do seem close2gether dont complain its probably an indica strain ur growing. some peopele including me try to keep their plants short