Quote Originally Posted by eddie View Post
Another option would be to use a longer lens, which would require having the lamp head higher, for the same size enlargement.
This sounds like a great idea, but it doesn't work.

The intensity of light at the baseboard is a function of the intensity of the light source, the aperture of the lens, and the magnification ratio between the original negative and the resulting print.

So changing lenses and raising the lamp head makes no difference, because the resulting magnification ends up being the same.

It may benefit you in one way though. A shorter lens may go only to f/16, whereas a longer lens may offer f/22 or even f/32 minimum apertures.