During pradosha kAla on Aswayuja bahula truyodashi,Lamps(ellu yenne deepa i.e lamps lighted with sesame oil) is to be lighted OUTSIDE home. The deepa should face in south direction. This is called yama deepa and by doing so yama devara antaryAmi Sri Lakshmi Narasimha devaru will completely destroy apamrutyu.
Chant the following Mantra::
Kaalena Shyaamaya saha|
SooryaRjaaH PriyathaaM Mama||
With folded hands , facing South, to pray Mantra:
The following statement is worth remembering:
Sadhaa Lakshmi SthiraabhavEth!!
Athra SaiShaa DheepaavaLi smruthaa !!