Hi Ross,

Photo supply stores offer "daylight bulbs" which simulate sunlight pretty
well, and can be used with daylight-balanced films.  Like any commodity,
some are better (and more expensive) than others.  Good quality daylight
bulbs might cost $10.00 each.  As Enzo said, there are filters that can be
placed over ordinary photo flood lamps to produce daylight quality
illumination, but this is the most expensive way to go. Daylight bulbs are
actually incandescent bulbs which are either coated with such a filter
material, or have the material incorporated into the glass itself. These
filter out a lot of the longwave light produced by an incandescent light
source, resulting in a cooler (bluer) output, close to daylight quality.  As
you said, such bulbs do get very hot during use. They have to have a high
wattage because so much of the light produced by the filament is filtered
out.  Still, I have found that these bulbs do last quite a long time under
normal usage on a copy stand (turning them off between exposures - which you
will want to do anyway, to avoid being cooked while positioning the next
specimen).
Another option is to use ordinary 3400K photo floods, or 3200K tungsten
lights (ordinary home light bulbs), with a color correcting (blue) filter
over the camera lens. This is the cheapest way to go in the long run (you
don't have to keep replacing expensive bulbs), and gives good results if you
purchase a good quality filter.
Unfiltered fluorescent illumination will give your pictures a green cast,
but such illumination could also be used with an appropriate filter. Such a
filter would probably be harder to find for your camera though, since these
filters are much less in demand than tungsten filters. Also, the color range
of a fluorescent tube changes as the bulb gradually warms up during use,
whereas the color output of an incandescent source is constant.
Some top-of-the-line digital cameras have built-in color correction. You set
the camera for the type of lighting you are using, and the camera makes the
necessary corrections.

Paul M.