Hi all,
I have some info on that flat flourescent bulb/fixture. It's $30 at
Home Depot and it's a Lights of America model 9027. It comes pretty
complete, just add 110 volts. It says on the box "no hum, instant start,
instant re-strike". It also says it has "New Flourex Technology". It
might make a pretty good enlarger light source for not much money.
Gene
Robert Stoddard wrote:
>
> Hi Gene,
> There is no doubt that some of them are visually much more white-looking
> than others, due to newer phosphors. Whether they are good enough for
> variable-contrast papers to be used without adjustment of printing time, and
> whether the full range of contrasts can be gotten, can only be determined by
> trying them. There is also the problem of changing light output with
> warmup. Maybe it might work better to have a lens cap that you remove to
> make the exposure so that the fluorescent light source could be fully warmed
> up before exposure.
> Bob S.
>
> >From: Gene Johnson <[EMAIL PROTECTED]>
> >Reply-To: [EMAIL PROTECTED]
> >To: [EMAIL PROTECTED]
> >Subject: Re: [Cameramakers] Speed Graphic Enlarger/spectral trouble
> >Date: Tue, 19 Jun 2001 06:59:24 -0700
> >
> >Robert,
> >
> >You know,I think that may be changing. These bulbs seem very white.
> >Much whiter than other flourescents I've seen in the past. I'm seeing
> >other flourescents like this now too. I'm wondering if there has been
> >some improvement in the technology. Kind of hard to tell with the eye,
> >but I think some of them even mention "full spectrum" or something
> >similar on the packaging.
> >
> >Gene
> >
> >Robert Stoddard wrote:
> > >
> > > Hi Matt,
> > > The problem is that fluorescent lamps don't have a continuous spectrum
> >of
> > > colors of light as a hot filament lamp does. This probably would not be
> >a
> > > problem if you are using single contrast-grade B&W enlarging paper,
> >since it
> > > would only affect the time required to print. If using multi-contrast
> > > paper, it might cause some trouble because of the fact that the color of
> >the
> > > light must be changed to get the different contrasts.
> > > RkS
> > >
> > > >From: Matt Mengel <[EMAIL PROTECTED]>
> > > >Reply-To: [EMAIL PROTECTED]
> > > >To: Cameramakers <[EMAIL PROTECTED]>
> > > >Subject: [Cameramakers] Speed Graphic Enlarger/spectral trouble
> > > >Date: Mon, 18 Jun 2001 07:18:41 -0700 (PDT)
> > > >
> > > >Thanks to everyone on the speed graphic light head
> > > >stuff. I think I have enough info to get started BUT,
> > > >there have been some concerns here as to spectral
> > > >problems with different light sources. Can anyone shed
> > > >some light (sorry) on what the problem(s) would be. I
> > > >am not at all familiar with this. If I used a source
> > > >with the wrong color temp. what would happen? I'm
> > > >speaking in the B&W sense of course.
> > > > Also, I mentioned earlier the Ansel Adams book, "The
> > > >Negative". After I actually READ the book instead of
> > > >just reading captions, I got a little more insight on
> > > >the type of enlager he was describing. If anyone is
> > > >interested just about any library has this series.
> > > > Thanks
> > > > Matt
> > > >
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