hey you can grow with cfl's you just need about 4 or 5 26watt(100 watt) cfls per plant that you want to grow. That is what I have read acrossed this page. so its not too high priced and some mylar. that stuff is not that much. you just have to think out side the box when it comes to mylar. From what I have seen some of the people look like they are using winsheild covers that are all silver. they say on the pack that they reflects 99% light and uv. that is what I am going to get to put into my setup.