Steve,

OptiQuip has new stabilized Hg light sources.  Many years ago I was the
East Coast microspectrophotometry specialist for Zeiss and used stabilized
HBO's but they have been very expensive.  OptiQuip has extensive experience
in this area and makes lamp housings to fit most microscopes.  If
interested, contact: Mel Decker - [log in to unmask]

Caveat: no vested interest.

Best regards,
Barbara Foster
Microscopy/Microscopy Education
125 Paridon Street, Suite 102
Springfield, MA 01118
PH: 413-746-6931  FX: 413-746-9311  Web: www.MME-Microscopy.com/education

"Why didn't they teach us that sooner?"  ... probably because no one
thought to call MME about customized, on-site courses.  Offered in all
areas of microscopy, sample prep,and image analysis, they make an immediate
impact on your productivity.
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At 09:41 AM 2/28/01 +1100, Stephen Cody wrote:
> >From my observations of using both types of light source, the Xenon seems
>far more stable with time. You don't notice the fluctuations that you get
>with Hg bulbs. This is important for quantification, such as dual excitation
>ratio methods (eg. Fura-2).
>
>Stephen H. Cody,
>Colon Molecular and Cell Biology Laboratory,
>Ludwig Institute for Cancer Research,
>Post Office Royal Melbourne Hospital,
>Parkville, Victoria 3050, Australia.
>
>Tel: 61 3 9341 3155   Fax: 61 3 9341 3104
>email: [log in to unmask]
>www.ludwig.edu.au/confocal
>
>
> > ----------
> > From:         Tom Phillips[SMTP:[log in to unmask]]
> > Reply To:     Confocal Microscopy List
> > Sent:         Wednesday, 28 February 2001 2:08
> > To:   [log in to unmask]
> > Subject:      Re: Xenon lamps
> >
> > All true but I believe one disadvantage is the peak illumination is
> > less for some fluorochromes such as DAPI.  We see a difference in our
> > two systems that have Hg or Xe.
> >
> >