Re: Lighting for Antique Power Plant
- From: lederman@xxxxxxxxxxxxxxxxx (B. Z. Lederman)
- Date: 26 Oct 2005 11:18:59 -0500
In article <1130340875.148077.136300@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, meow2222@xxxxxxxxx writes:
> B. Z. Lederman wrote:
>> In article <1130287841.073417.115170@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, meow2222@xxxxxxxxx writes:
>> > redyellowgreen@xxxxxxxxxxxxxxx wrote:
>
>> To answer a question in a previous post, flourescent lamps
>> certainly did exist then. There were the usual small wattage
>
> Yes, but: they existed but were unavailable. Converting factories from
> filament to fl was something of a priority, due to far lower run costs,
No doubt there were priorities, and more in the U.K. than in
the U.S.A. But books I've read on activities during the war (in
such places as Bletchley Park) indicate that flourescent lighting
was in use.
>> The handbook also has a section on recommended illumination
>> levels. For "Powerplants, Engine Rooms, and Boilers", the
>
> Yes, I'll bet the catalogues were beacons of wild optimism, speaking of
> the new age of all-over illumination created only by (their)
> flourescents.
This book isn't a catalog in the usual sense: it's hard-cover
(or semi-hardcover), and is a fairly even-handed treatment of
many aspects of lighting. Though they certainly were interested
in promoting greater use of lighting (there are examples of
better lighting in stores and display windows, for example), the
illumination levels given seem to be in line with practices of
the time (relatively high illumination on the workbench for tasks
like watchmakers, and what we would consider to be very low
illumination levels for storehouses, roads, and even walkways
between work areas). Even the section on lighting airports calls
for much less in the way of illumination than we would probably
want to see today. It's really quite interesting to compare it
to modern practice. It's also a tiny fraction of the size of
even a current lamp catalog: there are only a few pages
describing the range of lamps available. Most of the book is
really about lighting issues.
By the way, the ballasts don't usually show power factor
correcting capacitors, though the two lamp ballasts do have an
internal capacitor. And I doubt if you could even buy a two lamp
pre-heat ballast for F40T12 lamps today : you'd have to (and
would probably want to) use a modern rapid start or electronic
ballast, and perhaps have the starter cans mounted within the
fixture to satisfy the 'purists'.
Bart.
.
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