I clone under a 600mh about 5 ft away, used all different flourecents in there own clone room but found it easier in long run to just clone in veg room. As long as the dome is full of condensation you will be fine. Here is what i do and its super simple and works everytime. I take a transparent plastic cup about 12oz and put about 1.5 inches of Promix in it. Wet it decently and poke a hole with a pen all the way down in the middle in it. Take your clone and dip it in what ever cloning stuff you got, I prefer powder and stick in hole. Gently fill hole around clone, water should come out the bottom holes at this point if watered correctly. Now take a sandwich baggie and a rubber band and stick it over the cup so there is a couple inch plastic dome over it. Stick under any light but make sure close enough for condensation if using flourecents but Metal halides can work much farther away. Take bag off everyday and exchange air, NO spraying. Do this everyday until you see roots. Once you see roots start a small hole in top of bag and ever day make it bigger until its ready for no bag.