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<p>We have standardized on Super Bright's T8BDA-30K18A. It has been
a year since they were installed. No complaints from users, failed
litho-processes or lamps. We used to use sleeves on standard
fluorescent T8 lamps, but the sleeves degraded both in filtering
ability (the amber hue lightens significantly) and the plastic
turned brittle after a couple of years. It was a real pain to
replace the sleeves regularly. I would never go back to CFL +
Sleeves.</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 3/4/2026 2:15 PM, Collins, Deon
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:DM6PR11MB3162E9F2D64612FAE2F7CD47D77CA@DM6PR11MB3162.namprd11.prod.outlook.com">
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Revisiting this older post.</div>
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<br>
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HMNTL has T-8's currently with UV filters. </div>
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<br>
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Before I pull the trigger on filtered LED replacements, I want
to make an inquiry. I am contemplating purchasing nonfiltered
LEDs and reusing the UV filters from our CFL bulbs. Being we
have 8 photolithography labs; initial conservative savings look
to be around $5000.</div>
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<br>
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Superbrightleds T8BDA-30K18A-30PK at 568.50 for a 30 pack </div>
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Vs Superbrightleds T8U4-SW5C22-F-25PK at 199.99 for a 25 pack</div>
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<br>
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<br>
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Thanks in advance. </div>
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<br>
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<p
style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"
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<span style="color: rgb(0, 32, 96);"><b>Deon D. Collins</b></span></p>
<p
style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"
class="elementToProof">
<span style="color: rgb(0, 32, 96);"><b> </b></span></p>
<p
style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"
class="elementToProof">
<span style="color: rgb(0, 32, 96);"><br>
<i>Director of Facilities</i></span></p>
<p
style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"
class="elementToProof">
<span style="color: rgb(0, 32, 96);"><i>The Grainger College
Of Engineering UIUC</i><br>
Holonyak Micro & Nanotechnology Lab</span><span
style="color: rgb(31, 73, 125);"><br>
</span><span style="color: rgb(19, 41, 75);">208 N Wright St
Rm. 1114 | MC-249</span><span
style="color: rgb(31, 73, 125);"><br>
</span><span style="color: rgb(19, 41, 75);">Urbana, IL 61801</span><span
style="color: rgb(31, 73, 125);"><br>
</span><span style="color: rgb(19, 41, 75);">217-300-7531 | </span><span
style="color: rgb(5, 99, 193);"><u><a
style="color: rgb(5, 99, 193); margin-top: 0px; margin-bottom: 0px;"
href="mailto:deonc69@illinois.edu"
moz-do-not-send="true" class="moz-txt-link-freetext">deonc69@illinois.edu</a></u></span><span
style="color: rgb(31, 73, 125);"><br>
<br>
<br>
<u><a
style="color: rgb(31, 73, 125); margin-top: 0px; margin-bottom: 0px;"
href="http://illinois.edu/" moz-do-not-send="true"><img
style="width: 1.239in; height: 0.218in; margin-top: 0px; margin-bottom: 0px;"
height="20" width="118"
alt="https://webtools.illinois.edu/webservices/js/ds/signature_logo.png"
data-outlook-trace="F:1|T:1"
src="cid:part1.aHXud14G.5Kygcmog@ucsb.edu" class=""></a></u><br>
<br>
</span><span style="color: rgb(102, 102, 102);"><i>Under the
Illinois Freedom of Information Act any written
communication to or from university employees regarding
university business is a public record and may be subject
to public disclosure.
</i></span></p>
<p
style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"
class="elementToProof">
<span style="color: rgb(31, 73, 125);"><u> </u></span></p>
<p
style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"
class="elementToProof">
<span style="font-size: 10pt; color: rgb(163, 35, 139);"><b>Life
begins at the end of your comfort zone.
</b></span></p>
<p
style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"
class="elementToProof">
<span style="font-size: 10pt; color: rgb(163, 35, 139);"><b>
Propeck Amanda</b></span></p>
<p
style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"
class="elementToProof">
</p>
</div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif"
style="font-size:11pt" color="#000000"><b>From:</b> labnetwork
<a class="moz-txt-link-rfc2396E" href="mailto:labnetwork-bounces@mtl.mit.edu"><labnetwork-bounces@mtl.mit.edu></a> on behalf of Cohen, Ana
N CTR USARMY DEVCOM ARL (USA) <a class="moz-txt-link-rfc2396E" href="mailto:ana.n.cohen.ctr@army.mil"><ana.n.cohen.ctr@army.mil></a><br>
<b>Sent:</b> Friday, February 17, 2023 9:55 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:labnetwork@mtl.mit.edu">labnetwork@mtl.mit.edu</a>
<a class="moz-txt-link-rfc2396E" href="mailto:labnetwork@mtl.mit.edu"><labnetwork@mtl.mit.edu></a>; <a class="moz-txt-link-abbreviated" href="mailto:massey21@llnl.gov">massey21@llnl.gov</a>
<a class="moz-txt-link-rfc2396E" href="mailto:massey21@llnl.gov"><massey21@llnl.gov></a><br>
<b>Subject:</b> Re: [labnetwork] Light filtering in
photolithography bays</font>
<div> </div>
</div>
<div class="BodyFragment"><font size="2"><span
style="font-size:11pt;">
<div class="PlainText">Hi Travis,<br>
<br>
A couple years ago we switched our lithography bay
fluorescents (T8) to<br>
amber tube LEDS from Super Bright LEDs. The light is more
orange than yellow<br>
so took a little adjusting (many users first thought it
was darker than<br>
usual), but visibility has actually been much better since
we these bulbs<br>
are more stable and we don't end up with dark patches from
dead<br>
fluorescents.<br>
<a
href="https://www.superbrightleds.com/t8-uv-blocking-led-tube-clean-room-18w-1800-"
moz-do-not-send="true" class="moz-txt-link-freetext">https://www.superbrightleds.com/t8-uv-blocking-led-tube-clean-room-18w-1800-</a><br>
lumens-single-end-dual-end-ballast-bypass-type-b-32w-equivalent-1800k+packam<br>
t-30-Pack <br>
<br>
Our fume hoods are still fluorescent bulbs with filters.
I've definitely<br>
noticed a degredation over time, but our facilities also
have purchased<br>
different filters over the years, so I can't provide much
comparison to your<br>
situation. However, it may be that your LEDS are emitting
higher wavelengths<br>
than the fluorescents. UV Process has UV filters along
with the color tubes<br>
which could be useful<br>
<a
href="https://www.uvprocess.com/c3/1790-gamtube-and-supertube-filters.html"
moz-do-not-send="true" class="moz-txt-link-freetext">https://www.uvprocess.com/c3/1790-gamtube-and-supertube-filters.html</a><br>
<br>
We don't filter our computer screens because don't notice
much light<br>
pollution and we don't keep anything photosensitive nearby
long-term, but<br>
you can definitely turn down the brightness and blue
saturation on the<br>
monitors. We also have not needed to replace the darker
pigment filters on<br>
our doors' windows, but similar to the monitors they are
placed sufficiently<br>
distant from the photoresists/coated substrates.<br>
<br>
Good luck!<br>
Ana<br>
<br>
--<br>
Ana N. Cohen [she/her/hers]<br>
Photolithography Cleanroom Technician<br>
Contractor | General Technical Services, LLC<br>
US Army Research Laboratory<br>
2800 Powder Mill Road, Adelphi, MD 20783<br>
Tel: 301-394-1527<br>
Email: <a class="moz-txt-link-abbreviated" href="mailto:ana.n.cohen.ctr@army.mil">ana.n.cohen.ctr@army.mil</a><br>
<br>
</div>
</span></font></div>
<br>
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<pre class="moz-signature" cols="72">--
Prashant Srinivasan,
Teaching Cleanroom Engineer
Electrical & Computer Engineering
University of California, Santa Barbara
Santa Barbara, California 93106
<a class="moz-txt-link-freetext" href="https://www.ece.ucsb.edu/department-resources/electronics-shop/tcr">https://www.ece.ucsb.edu/department-resources/electronics-shop/tcr</a></pre>
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