I have used flouresent lights for start and that works great, when the plants (tomato) start to get bigger, is there any advantage to using metal halide or sodium above the flouresent. My thinking is keep the flouresent right above the plants and add the other light higher up. To give it a more balance light. The other lights I think are too hot to get within 2" of the seedlings. has anyone tried this or is it just not nessacary because the flouresents do a good enough job. thanks.