Been doing my own lil experimentation,... the tissue paper you get in a gift box , well the local hobbie/craft store sells this tissue paper in silver foil, and gold. I use 24" dome light covers and 300w cfls , well I sprayed tack on the edge and draped this foil tissue down from it, it took 3 sheets to wrap it. So far I am pleased with the results. They get light penetration all thru to bottom. I have 2 plants under silver almost finished and 3 under gold in veg. The gold is working great on a kush plant in veg with great growth . With the lights on under the dome I can see my plants for the foil tissue is more like a window tint, and when the lights are off the plant can't be seen thus putting her into darkness. I post on Flickr under bayou bud 2011 .I'm happy with these results and plan to continue till disaster strikes lol