<div dir="ltr">supposedly this is the source not to defer to the night   <a href="http://www.hebrewbooks.org/pdfpager.aspx?req=15941&st=&pgnum=370">http://www.hebrewbooks.org/pdfpager.aspx?req=15941&st=&pgnum=370</a><div>
<br></div><div>though it doesnt specifically say that it is not considered limmud torah<br><div><br></div></div></div>