I don't believe they were in Tennessee in 1910. I didn't find him in 1910 anywhere.
I think this was your grandfather in 1880. He was called Chatham. I noticed he was called that in some census other records also.
1880 United States Federal Census Name: Chatham Bright Home in 1880: District 3, Coffee, Tennessee Age: 1 Estimated Birth Year: abt 1879 Birthplace: Tennessee Relation to Head of Household: Son Father's Name: George B. Father's birthplace: Tennessee Mother's Name: Mary A. Mother's birthplace: Tennessee Marital Status: Single Race: White Gender: Male Name Age George B. Bright 37 Mary A. Bright 34 William D. Bright 13 Caldonia I. Bright 11 Glen Bright 8 Nancy A. Bright 6 Ewell Bright 3 Chatham Bright 1
1920 United States Federal Census Name: Joseph Bright Home in 1920: Bon Jellico, Whitley, Kentucky Age: 45 years Estimated Birth Year: abt 1875 Birthplace: Kentucky Relation to Head of House: Head Spouse's Name: Maud Father's Birth Place: Tennessee Mother's Birth Place: Tennessee Marital Status: Married Race: White Sex: Male Home owned: Rent Able to read: Yes Able to Write: Yes Image: 932 Household Members: Name Age Joseph Bright 45, entry supervisor, coal mines Maud Bright 35, b Tn Lela Bright 12, B Tn Jaunitta Bright 9, b Tn Woodrow Bright 6, b Tn Cassie Bright 4, b Ky Cheatim(Chatham) Bright 1 4/12 b Ky
1930 United States Federal Census Name: Chudum (Chatham) Bright Home in 1930: Masons Creek, Perry, Kentucky Age: 51 Estimated Birth Year: abt 1879 Birthplace: Tennessee Relation to Head of House: Head Spouse's Name: Maud Race: White Occupation: laborer at coal mine Military service: no Rent/home value:rent $8 Age at first marriage: Parents' birthplace: Household Members: Name Age Chudum Bright 51, b Tn,mar age 22 Maud Bright 47, mar age 15 Woodrow Bright 15 Cassie Bright 14 Herman Bright 10 Blain Bright 7 Opal Bright 1 3/12
Kentucky Death Records, 1852-1953 Name: J C Bright Death Date: 6 Feb 1933 Death Location: Knott Residence Location: Knott Age: 55 Gender: Male Ethnicity: White Birth Date: 28 Feb 1877 Birth Location: Tennessee Spouse's Name: Maudy Bright Father's Name: George Bright Father's Birth Location: Tennessee Mother's Birth Location: Tennessee