Roll of aluminum flashing $8 Reflective Mylar $8 Being bored over the summer and really finding out how creative you are? Priceless Decided to try to build one of these things, I measured and cut the aluminum flashing by hand with tin snips (really wish I had a nibbler), cut all 9 pieces out. Drilled and riveted all the pieces together. Surprised to hell that all those pieces actually fit together in a 3d space as well as they did. I still have to put the mylar in, I'm currently testing that on my spider reflectors, and so far there's no noticable scorching or discoloration 3 inches from my 250watt MH bulbs, even so I might make a hole for a fan if i notice it later. I'll probably put mylar in tomorrow. Also need to cut a hole for the mogul and bulb, also a mounting bracket, but I can do that later as well. Either way, $20 Lumikearc (tm) Relfector Also will follow up as I put things together.