BBC: Ethiopians are rushing to get their hands on free energy-saving light bulbs which are being handed out by a utility to stop power cuts. Four million low-energy light bulbs are being given away in exchange for old-style incandescent ones by the Ethiopian Electric Power Corporation. Nearly all Ethiopia’s electricity comes from hydro-power. But without rain the dams cannot fill and the lights go out. The new bulbs will cut peoples’ power bills and are supposed to last …