Re: alternative to flourescent tubes.

From: [email protected]
Date: 05/31/05-04:58:41 PM Z
Message-id: <053120052258.21771.429CEC21000698450000550B22007340769D0104970E9BD20A0B9A06@comcast.net>

Greetings,

I am currently building a small light box for 8x10 that will use the 13 watt screw-in BLBs. It is being a slow process for me because I have a "bad" wrist (actually 2 "bum" wrists) - added another accupuncture session to my therapy already :-) - plus I am doing this in an apartment, which is not the best place for using power tools; nonetheless, with the help of my trusty 3/8 " power drill, hammer and hand saw, I expect to complete the box and be testing in another 10 days or so; I will report my results as I get them.

My approach to building things is somewhat the same as I have used for making "found objects" sculptures, except that I did make a series of diagrams before starting on the box! I found a bathroom-wall light fixture at Home Depot that has a very simple design with three ceramic sockets all wired and everything for only $15.90. The base is metal with a white-enamel painted surface. The sockets are exactly 6" from center to center; I am using two fixture strips for a total of 6 BLB bulbs, two rows of three so the overall box is approximately 12 x 18 inner dimensions. I spaced the two fixtures so the bulbs will be exactly 6" center to center is the short dimension of the box also, with 3" from the center of the bulbs to the sides of the box.

I will wire the two strips of sockets together to one cord with a plug. I am planning to put a 4" fan at one end and vents at the opposite end; the front has a door (removable board) to access shelves for the printing frame. The shelves are the last variable I will work on once the box itself is complete; my design plan (and the height of the box) includes room for 2 shelf-heights (one shelf, but supports at two levels - like putting racks in an oven or something like that). For this I could use some advice: I am thinking 3" and 4" might be good distances from the bulbs to the glass of the frame; any suggestions on this? I plan to start with cyanotype because I have done this procedure before (using the sun), but will be experimenting with other processes soon.

Thanks in advance for any tips you might have! BTW, the 13 watt screw-in BLBs I found were about $12 each as opposed to approx. $16-$17 for the 20 watters.
Judy
Judy Rowe Taylor
Mukilteo, WA
Art is a voice of the heart, a song of the soul.
www.enduringibis.com
jude.taylor@comcast.net or judyrowetaylor@enduringibis.com

Date: Tue, 31 May 2005 19:44:19 +0000
From: Sandy King <sanking@clemson.edu>
Subject: Re: alternative to flourescent tubes.
To: alt-photo-process-l@sask.usask.ca
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Yes, I have found the 20 watt screw-in BLB tubes available for around $11.

By my estimation the screw-in tubes have an advantage over straight
tubes in that they produce a lot more radiation for a given area
because of their smaller foot print. For example, a 20 watt BLB
screw-in is approximately 2.8"" in diameter, so that if one were to
fit them side by side they would easily go into 3" squares of nine
square inches. A 24" BLB tube that puts out 20 watts is 24" X 1.5" in
size, and therefore takes up about 36 square inches to put out the
same amount of radiation, actually more since you would have to leave
at least about a 1/4" space between the tubes, which brings us to
about 40 square inches. In other words, for the same amount of space
the tubes are putting out about four times as much radiation.

Sandy

>Those screw in black light fixtures are widely available for less than
>$16.95. Google
> Feit BPESL15T/BLB
> One webpage said they were available at Fry's, if there is one near
>you.
>I have no experience with these bulbs, but it looks like they would work
>well for 8x10 (maybe 4 bulbs) and even 11 x 14 (maybe 6 bulbs, maybe only
>4).
> The wiring would be a lot less intimidating for beginners.
>Charles Portland OR

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<html><head><style type="text/css"><!--
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 --></style><title>Re: alternative to flourescent
tubes.</title></head><body>
<div><font face="Geneva" size="+1">Yes, I have found the 20 watt
screw-in BLB tubes available for around $11.</font></div>
<div><font face="Geneva" size="+1"><br></font></div>
<div><font face="Geneva" size="+1" color="#000000">By my estimation
the screw-in tubes have an advantage over straight tubes in that they
produce a lot more radiation for a given area because of their smaller
foot print. For example, a 20 watt BLB screw-in is approximately
2.8&quot;&quot; in diameter, so that if one were to fit them side by
side they would easily go into&nbsp; 3&quot; squares of nine square
inches. A 24&quot; BLB tube that puts out 20 watts is 24&quot; X 1.5&quot;
in size, and therefore takes up about 36 square inches to put out the
same amount of radiation, actually more since you would have to leave
at least about a 1/4&quot; space between the tubes, which brings us to
about 40 square inches. In other words, for the same amount of space
the tubes are putting out about four times as much
radiation.</font></div>
<div><font face="Geneva" size="+1" color="#000000"><br></font></div>
<div><font face="Geneva" size="+1" color="#000000">Sandy</font></div>
<div><font face="Geneva" size="+1"><br></font></div>
<div><br></div>
<div><br></div>
<blockquote type="cite" cite>Those screw in black light fixtures are
widely available for less than<br>
$16.95.&nbsp; Google<br>
&nbsp;Feit&nbsp; BPESL15T/BLB<br>
&nbsp;&nbsp;&nbsp;&nbsp; One webpage said they were available at
Fry's, if there is one near<br>
you.<br>
I have no experience with these bulbs, but it looks like they would
work<br>
well for 8x10 (maybe 4 bulbs) and even 11 x 14 (maybe 6 bulbs, maybe
only<br>
4).<br>
&nbsp;&nbsp;&nbsp;&nbsp; The wiring would be a lot less intimidating
for beginners.<br>
Charles&nbsp;&nbsp;&nbsp; Portland OR</blockquote>
<div><br></div>
</body>
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Received on Tue May 31 16:59:01 2005

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