I'm sorry. I wasn't very explanitory in my question. Our clones are several weeks old now and our biggest is a Big Wreck that is 10 inches and the others are about 5 inches. The others aren't going very fast and we're wondering if we put the 600 watt mh on 24/7 rather than the 18/6 it is now, if that would help them grow any faster? Also, what temp should the room be? It gets kind of cold at night. Thank you