It looks like you've got PH issues, i'd put a dome over the girls for a week raise the light 3-4 feet above the dome. Lift the dome once or twice a day for air exchange and watering. Before all this though perform a water runoff PH test and figure out where your at. Your using a shade right? I know it may sound like a stupid question but I cant imagine why you'd have the light so close if it was all being directed at the plant anyways.