I'm going to ignore an old lady who lives next door
I'm wondering what makes you want to ignore an old lady?
She leaves her lights on all night long.
Ignoring your neighbor just because her lights on her house bother you is poor manners. Speak with your neighbor and be pleasant with her, no matter if she annoys you or not.
Why should I be respectful to a old lady if she is the one who is being disrespectful? I just want to use my speakers, she can be thoughtful and turn down the lights when it bothers me if she cares about me.
Then you should both work out a deal, where you play less loud music and she keeps her lights off after a certain time? It could cause the unpleasantness between the two of you to go away a little bit. Just something to think about.