I just noticed your PS thank you for that idea. Since I have to be able to cover 20 x 24 inch negative vacuum glass, none of the usual lighting will work and any equipment with the word aerial in it is VERY expensive, although our products and papers seem considerable less expensive. I will look into it though. Right now I use the existing 20x24 inch flourescent light deck and have found a very unique solution to the obvious problems, but as yet I have not shared it with anyone, trade secret no one will ever use because they will have the right lighting.