Susan's middle name is said to be "Jane," but I have, so far, found no record with such a middle name.

1.  Marriage Record:

2.  Census Microfilm Records:  Pennsylvania, 1850 (Broderbund CD-305):  East Hanover Township, Lebanon Co., Pennsylvania, p. 254, 248/258, enumerated 5 Nov 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

Thomas Light	30	M	Carpenter	900	Pa
Susanna  "	27	F			"
Marcus Stine Light	2	M			"

3.  1860 Census Images (online at Ancestry.com; Image #73 of 112):  Quincy P.O., Indian Valley, Plumas Co., CA, p. 971, PN 73, 1214/1179, enumerated 21 Jul 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

Adam Light	41	M		Farmer	4000	1200	Pennsylvania
Susan    "	36	F					"
Marcus   "	12	M					"
Ephraim  "	9	M					"
Theodore "	5	M					"
Eugene   "	4	M					"

Living next to them is Adam's brother, Eleazer LIGHT.

4a.  1870 Census Index (online at GenealogyLibrary.com):

1870

Light, Adambanta, Abram

CA

Plumas Co.

Indian Twp.

p. 12

Obviously two names — "Light, Adam" and "Banta, Abram" — got entered into one field in the database.

4b.  Heritage Quest, Family Quest Archives CD M593-77:  Indian Township, Plumas Co., p. 12B, 1012/1027, enumerated 27 Jul 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

Light Adam	51	M	W	Farmer	1000	Pennsylvania
Susan	47	F	"	Keeping House		"
Ephriam	17	M	"			"
Theodor	15	"	"			"
Eugene	13	"	"			"

Living next door to Abram BANTA.

5.  LDS.  Family Search: Census Records: 1880 United States (online at FamilySearch.org):

Census Place: Hot Spring, Napa, California
Source: FHL Film #1254069; NARA Film #T9-0069; Pg 416B
	Relation	Sex	Marr	Race	Age	Birthplace	Occupation	Fa	Mo
Adam LIGHT	Self	M	M	W	62	PA	Farmer	PA	PA
Susan LIGHT	Wife	F	M	W	57	PA	Keeping House	PA	PA
Ephram LIGHT	Son	M	S	W	26	PA	Laborer	PA	PA

6.  California State Board of Health, Bureau of Vital Statistics. Certificate of Death.  Filed 17 Dec 1906.  County of Plumas, Quincy, California.

Name: Marcus Stein Light Date of Birth: July 16, 1848; Birthplace: Pennsylvania Name of Father: Adam Light; Birthplace of Father: Pennsylvania Maiden Name of Mother: Susan Stein; Birthplace of Mother: Pennsylvania

7.  LDS.  Family Search: Internet Genealogy Service:  IGI - International Genealogical Index (online at FamilySearch.org).

Sussanna STEIN Christening: 10 May 1823, Jonestown, Lebanon, Pennsylvania Father: Johannes STEIN; Mother: Maria