SAN FRANCISCO - JANUARY 31:  A worker at the City Lights Light Bulb Store holds a traditional incandescent light bulb (R) and an energy efficient compact flourescent bulb (L) January 31, 2007 in San Francisco, California. California State Assemblyman Lloyd Levine is preparing to introduce a bill that would call for the incandescent bulb to be banned in California and be replaced by compact flourescents. Getty Images logo Getty Images 64 months ago

SAN FRANCISCO - JANUARY 31: A worker at the City Lights Light Bulb Store holds a traditional incandescent light bulb (R) and an energy efficient compact flourescent bulb (L) January 31, 2007 in San Francisco, California. California State Assemblyman Lloyd Levine is preparing to introduce a bill that would call for the incandescent bulb to be banned in California and be replaced by compact flourescents.