While I don't have any experience with the lights you mention, I
have a great lighting alternative.
Yeah, me too. When the ballasts in my old three tube Dazor lamp blew
out, I went looking for either new ballasts (hard to find in small
quantities), or a new one. The new dazors are pricey indeed, but Otto
Frei just introduced a new imported three tube fluorescent lamp for
well under a hundred dollars (without checking I think it was about
80 bucks). It uses smaller diameter, but higher wattage full spectrum
lamps (so more light than the dazor), and is a well made lamp. I’m
quite happy with both the lamp, and the price I paid.
As for LED lamps in general, they’re getting better and better. I
recently upgraded the fluorescent ring lamp on my bench microscope to
the LED version. Brighter, truer colors. I’d guess that if the light
output on the bench lamp you’re looking at is in similar or higher
range to the fluorescent or other lamps you’re familier with, you’ll
be happy with the LED lamps. But to be sure, buy from a vendor that
will be willing to take it back if you’re not happy.
One possible thought that may apply for some. The LED lamps promise
a very long bulb life, thus presumably offsetting the higher initial
cost. But jewelers bench lamps may be subject to a stress that normal
office lamps are not. I know the old Dazor lamp I just replaced had
lots of various scorch marks on the lamp/bulb fixture, from getting
too close to a lit torch. I recall blowing out at least one of the
actual bulbs that way one time, and another bit the dust once when
hit by a fast moving bit of metal that the flex shaft had caught and
thrown at it. I rather expect that LED bulbs would not be immune to
that sort of abuse either, so how long your bench lamp will actually
last may be in part affected by how and where you use it.