To slow it down for faster paper, one could always add neutral density
filtration between the lamps and the top glass. Simply putting cut sheets of
tissue or even bond paper below the glass will work.


"Richard Knoppow"
I got one of these guys several years ago cheap because the owner had
broken the upper glass in transit to a photo sale. I've never used it,
there is no longer any paper slow enough. These were made originally for
printing 10x10 aerial camera negs on slow contact paper like Azo. The
lamps not only switch individually but in groups of ring shapes to
compensate for the fall off from some wide angle aerial lenses. The
civilian version has a nice stainless steel mask. I am afraid they are now
boat anchors.