<html><head></head><body><div class="ydp769a38b7yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div></div>
<div dir="ltr" data-setdir="false">If it has a transformer, and it is 12v, then it is probably an automotive bulb. So, that should narrow down the search considerably. <br></div><div dir="ltr" data-setdir="false">I did come across one source that lists some dimensions for bases. So, if one of these matches your bulb, you may be 90% of the way there.</div><div dir="ltr" data-setdir="false"><a href="http://ghiya.co/different-light-bulb-bases/" rel="nofollow" target="_blank" class="">http://ghiya.co/different-light-bulb-bases/</a></div><div><br></div><div dir="ltr" data-setdir="false">-Joe<br></div></div></body></html>