<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1502213846376_14345" dir="ltr">These kinds of lights are also used in the refrigeration industry. Here is one source that sells the fixtures for $28 UDS. I don't know the size of the threads. Just search for Vapor Proof.</div><div dir="ltr" id="yui_3_16_0_ym19_1_1502213846376_14246"><a href="https://www.katom.com/381-25113.html" class="" id="yui_3_16_0_ym19_1_1502213846376_14245">https://www.katom.com/cat/baffle-filters-for-hoods.html</a></div><div dir="ltr" id="yui_3_16_0_ym19_1_1502213846376_14344"><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1502213846376_14390">And another source<br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1502213846376_14409"><a href="http://www.webstaurantstore.com/" id="yui_3_16_0_ym19_1_1502213846376_14410" class="">http://www.webstaurantstore.com/</a></div><div id="yui_3_16_0_ym19_1_1502213846376_14426"><br></div><div id="yui_3_16_0_ym19_1_1502213846376_14478"><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1502213846376_14334">-Joe</div></div></body></html>