Personally I have gotten away with just using a long bulb 10 watt fluorescent just to get the seedlings going. And I put that mother right above the seedlings with no problems. Soooo.. If you are using a stronger output bulb... you shouldn't have much issue with having the light higher up off your plants. As far as transplanting your plants... I have no idea as I have never had to do that. If you start to see your babies stretch too much.. just move the light closer to them... it will not hurt them with just one bulb. Never had a problem. You can make a bubbler pretty cheap using a 1 to 2 gallon storage bin. You can get netted pots for about 1.50 a piece from hydro store.. cut 2" to 3" holes in snap-on lid (depending on the size of your baskets) put an airstone in the reservoir and use plain tap water to help get them rooting. I put a little bit of hydroton rocks and the rooter plug and then fill the rest of the basket with hydroton and make sure to fill the reservoir up to where it is just touching under the baskets. The airstone will cause the water to "splash" the bottom of the rooters and keep the water well oxygenated as well as encourage strong roots. Also this will keep your rapid rooters moist encouraging seedling to grow. I honestly didn't even use a dome for mine when they were in the bubbler. I will take some pics of my homemade bubbler to show you what I'm talking about. I recommend using a long style airstone for fish aquarium and a 10 gallon capacity air pump which you can get for about 8 to 10 bucks at any pet store.