Close to 50,000 families in U.S. cities will save energy this summer through CITGO’s lighting program. CITGO Petroleum Corp. launched the third-edition of its CITGO-Venezuela Energy Efficient Lighting Program, which will provide 500,000 energy-efficient compact fluorescent lightbulbs (CFL) to households in 17 U.S. cities. The program launched in 2008 as a pilot program, and has…