LA Times: When octogenarian Arthur H. Rosenfeld vacates his utilitarian office at the California Energy Commission this week, one of his final tasks might seem of little consequence: He’ll turn off the lights. But that simple act — some would say compulsion — has transformed California into a world leader in energy efficiency. California homes are loaded with personal computers, widescreen TVs, iPods, PlayStations, air conditioners, massive refrigerators, hot tubs and swimming pool …