( say this in the euening as you switch on the light or sacred lamp )
Deepam jyothihi parabrahma
Deepam jyothir janadhanaha
Deepo harati paapaani sandhyaa
deepam Namosthuthe .
with meanings . Light which destroys darkness is the real light . Light is yhe incarnation (avataae ) of para Brahma. LIght also means lord Shiva, Vishnu etc. Light can destroy all our sins . Therefore my namaskaras to the evening light .