The recent Chapter 7 bankruptcy and liquidation filing of the Toledo, Ohio-based solar-panel manufacturer Xunlight Corp. has attracted barely any national attention. Maybe it’s gotten to the point — after Solyndra, Evergreen, Abound, and Satcon — that the failure of another government-backed alternative energy company is a dog-bites-man story. It’d be newsworthy if any of them actually ever succeeded. But it’s worth pausing for an autopsy and retrospective on Xunlight, because it’s a great (or terrible, depending on how you look at it) example of how government at all levels — state and federal — and in both parties —...