EXPLAINER-Battle over Osram takes further twist <!-- no image --> <div>An unprecedented bidding war has erupted over German lighting group Osram, with private equity group Bain swapping partners to team up with Advent to prepare to outbid Austria's AMS .<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=NzOM32vMLG8:7b9WExYDlDk:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?d=yIl2AUoC8zA" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=NzOM32vMLG8:7b9WExYDlDk:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=NzOM32vMLG8:7b9WExYDlDk:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=NzOM32vMLG8:7b9WExYDlDk:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=NzOM32vMLG8:7b9WExYDlDk:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/NzOM32vMLG8" height="1" width="1" alt=""></div> Posted by Reuters