Arthur Hinton "Art" Rosenfeld (June 22, 1926 – January 27, 2017) was a UC Berkeley physicist and California energy commissioner, dubbed the "godfather of energy efficiency", for developing new standards which helped improve energy efficiency in California and subsequently worldwide. Rosenfield was born in Birmingham, Alabama, in 1926. Starting in 1954 he served as a professor of physics at the University of California at Berkeley and a senior staff member at Lawrence Berkeley National Laboratory.