I found a thread in our forum that discussed dvi madhyama ragas:
http://rasikas.org/forums/viewtopic.php? ... ragas.html
Lalith is mentioned in the above thread also as dvi madhyama raga, so Cool felt it right.
Another one of SKR's dvimadhyama ragas is called Suryasri, if that is of any help.
In the above thread, there is a sendspace link containing the lec-dem by SKR on dvi madhyama ragas. That has since expired. If someone has a copy please upload and provide the link.
May be, he talks about mayasri there.