Troubled Oakland solar company Sungevity, now dubbed Solar Spectrum, said Tuesday that is has merged with another California solar giant, Horizon Solar Power, to create the state's second-largest residential solar company. Terms of the deal weren't disclosed, but Sungevity's $50 million sale to private equity firm Northern Pacific Group post-bankruptcy was approved by a Delaware judge in April. The company struggled after its abrupt closure in mid-March to pay some of the 410 workers it had laid...