> I don't know, however, how to get 82 volt @ 1.1A regulated.
All the ways that I know how to design 230VAC to 82V regulated are very ugly.
An additional problem is that the lamp will pull 3 to 10 times more current at start-up. We'd like to reduce this, for lamp-life and because the 3A-10A surge is extra work for the regulator.
The most efficient version that I could think of dissipated over 700 Watts peak 200 Watts average in a resistor (which could be an electric tea-pot) plus 160 Watts in a MOSFET (which means several MOSFETs on a very large heatsink).
More efficient would be seven 12VDC 2A switching regulators in series. www.jameco.com
AC/DC Power Supply Single- Output 12 Volt 2.08A
$18.95 each ($134 for seven) (plus shipping and import taxes in your country)
A 230:115 autotransformer (or dual-primary 75VA transformer) is even more efficient and cheaper, though not regulated.
> the awful stepdown transformer
What is so awful about the stepdown transformer? You only need 100VA. It can hide under the bench.
Have you contacted Beseler to see if there is a Euro-Market lamp? http://www.beselerphoto.com/international.htmlhttp://www.beselerphoto.com/reachus.htmlhttp://www.donsbulbs.com/cgi-bin/r/t.pl?searche=enlarger
> life is rather short - estimated at 40 hours.
As I recall, you turn-off an enlarger when not exposing(?). Take 10 second exposures, that's 14,400 prints, maybe less if thousands of on-surges shorten life. In a high-volume commercial shop doing long runs of identical prints, that's a couple of high-profit weeks. In hobbyist use, 10,000 prints is more than a lifetime.