<div dir="ltr"><div class="gmail_default" style="font-family:georgia,serif;font-size:small">Tom,<br></div><div class="gmail_default" style="font-family:georgia,serif;font-size:small">See below for a response I made to a similar inquiry to labnetwork from last spring. I might add that we used G10 yellow film from Encapsulite for the filtering. <br></div><div class="gmail_default" style="font-family:georgia,serif;font-size:small">Greg<br><br>--------------------------------------------------------------------------------<br></div><div class="gmail_default" style="font-family:georgia,serif;font-size:small"><br><div class="gmail_default" style="font-family:georgia,serif;font-size:small">A few years ago we replaced 630 40 watt T12 florescent lamps in our <span>cleanroom</span> with 20 watt T8 <span>LED</span>
lamps from Phillips. The T12 lamps had to go since they were being
phased out of production. We looked at moving to T8 fluorescents, but
that would have required considerable rewiring to replace all the remote
ballasts that worked with the T12 lamps but would not work with the T8
lamps. Our local energy company had a rebate program for <span>LED</span> lighting, and that combined with the energy savings convinced our energy management department to fund the replacement. The <span>LED</span>
lamps did not require a ballast, only some minor rewiring to route line
voltage to the fixtures. It took a few electricians 3-4 days to do the
work, but in the end it worked out pretty well. After 3 years we have
not lost a lamp. The energy management team told me together with the
occupancy sensors that were also added we were saving around $13K/yr in
energy costs. <br><br></div><div class="gmail_default" style="font-family:georgia,serif;font-size:small">Here is a link to the <span>LED</span> lamps we used:<br><a href="http://www.lighting.philips.com/pwc_li/us_en/connect/tools_literature/downloads/p-6206.pdf" target="_blank">http://www.lighting.philips.com/pwc_li/us_en/connect/tools_literature/downloads/p-6206.pdf</a><br></div><div class="gmail_default" style="font-family:georgia,serif;font-size:small"><br></div>Before
we agreed to this change, we investigated the resist exposure issue.
Our T12 lamps had the yellow sleeves, but we did not want to go with
these sleeves on the <span>LED</span> T8 lamps due to
concerns that the lamp temp would rise too high and reduce the
lifetime. Instead we ended up buying some UV filtering film (we tested
several for resist exposure) and manually cutting pieces to snugly fit
inside the plastic housing surrounding the lamp (we have the old
"teardrop" style lights in that <span>cleanroom</span>). That was a pain to do, but in the end it worked pretty well.<br></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><font face="times new roman,serif"><span style="font-family:georgia,serif">Regards,<br>Greg<br><br>Greg Cibuzar</span><br style="font-family:georgia,serif"><span style="font-family:georgia,serif">Manager, Minnesota N<font size="2">ano</font> C<font size="2">en</font>ter</span><br><span style="font-family:georgia,serif"><a href="http://www.mnc.umn.edu" target="_blank">www.mnc.umn.edu</a></span><br style="font-family:georgia,serif"><span style="font-family:georgia,serif">University of Minnesota</span><br style="font-family:georgia,serif"><span style="font-family:georgia,serif">612-625-8079</span><br></font></div></div></div>
<br><div class="gmail_quote">On Tue, Sep 22, 2015 at 1:30 PM, Tribble, Thomas A. <span dir="ltr"><<a href="mailto:tribble@fas.harvard.edu" target="_blank">tribble@fas.harvard.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p class="MsoNormal">The replacement of T-8 and T-5 fluorescent lamps outside the cleanroom is becoming an increasingly popular Facilities practice. Has there been any experience with this kind of retrofit inside the cleanroom? Specifically, in Lithography
and other UV sensitive areas of the cleanroom, have there been any observed (or anticipated) adverse effects from the use of LED lamps?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thanks . . . Tom<u></u><u></u></p>
<p class="MsoNormal" style="text-align:center" align="center"><u></u> <u></u></p>
<p class="MsoNormal" style="text-align:center" align="center"><b><span style="font-size:10.0pt;font-family:"Leelawadee","sans-serif";color:#365f91">Thomas A Tribble PE, JD | Northwest 102.32 | 52 Oxford Street | Cambridge, MA 02138 | (tel) <a href="tel:617%20495%200990" value="+16174950990" target="_blank">617 495 0990</a> |(cell)
<a href="tel:617%20780%205685" value="+16177805685" target="_blank">617 780 5685</a> |</span></b><u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div>
<br>_______________________________________________<br>
labnetwork mailing list<br>
<a href="mailto:labnetwork@mtl.mit.edu">labnetwork@mtl.mit.edu</a><br>
<a href="https://www-mtl.mit.edu/mailman/listinfo.cgi/labnetwork" rel="noreferrer" target="_blank">https://www-mtl.mit.edu/mailman/listinfo.cgi/labnetwork</a><br>
<br></blockquote></div><br></div>