Take your existing screen brightness, take it down 20% for the lens, then spread that light out over the whole area.. Not very bright at all.
You do have to flip the yoke.

Basically, with a high $ screen, in a dark room, starting with a larger screen, you can maybe get to an acceptable result.

_______________________________________________
http://www.piclist.com
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist