good night for

BBCの出口調査をもとに，NYTが英国の総選挙の行方を速報しています。日本のメディアの中にはキャメロン首相率いる保守党の不利を伝えているところがありますが，どうもそうではないようです。ここの a good night for 〜とはどのような比喩なのでしょうか。前回，締め切りに間に合わなかったpotterくん，お願いします。（KAwada）

British Exit Polls Point to Strong Showing for Conservatives

As polls closed across Britain, the BBC announced the results of the nationwide exit polls in its live broadcast. The polls indicate a good night for the Conservatives, projected to carry 316 seats, tantalizingly close to the 326 seats needed for an outright majority, and a very poor one for Labour, with just 239.

The New York Times is providing live updates from the election, as well as social media reaction, as the votes are tallied.

http://www.nytimes.com/live/uk-elections-2015/?emc=edit_na_20150507