Try Green County, KY. The only Light household (Sallie) in the 1810 census of Kentucky is there.
I am compiling a listing of the descendants of John Leech, b. 1768, who settled in what is now Hart County shortly before 1800.Here is the line on his daughter SARAH:
SARAH ("Sallie") LEECH.b. 10 Dec 1799, Barren Co., KY.d. (of cancer) 12 Dec 1856, Hart Co., KY.She married JACOB LIGHT.They are buried in the Old Burd Burial Ground near Lonoke, Hart County, KY.JACOB LIGHT was born 19 Aug 1797 in South Carolina, died 14 Sep 1857.He was the son of EBER and ELIZABETH LIGHT.JACOB LIGHT was a blacksmith (death certificate), also a farmer and a wheelwright (1850 census).
Their household first appears in the 1830 census, I believe.
Many of the settlers around Woodsonville and Rowletts, Hart County, KY were from upcounty South Carolina.