Can 良好 be used as a closing remark? 良好 is translated as be good, or be well in one of my dictionaries. This is a common closing remark in spoken English. Can 良好 be used in the same context in Chinese.

i.e.

OK, Bye now...
Take care, be well.


Are there instances where it might be used in closing an email (or the end of a letter)?

If these context are not correct please illustrate a situation where it would be appropriate to use this phrase.
良好, 令人满意；好。should be translated as good or well without the "be," then it can be used anywhere good or well are used. I never heard it being used as a closing remark, but under some circumstances, such use is possible.

祝你的程序运行良好.--Wish your application runs well.

Source: http://baike.baidu.com/view/96755.htm