Fireworks Lyrics

Lyric discussion by PT087 

Cover art for Fireworks lyrics by First Aid Kit

“I could have sworn, I saw fireworks From your house, last night As the lights flickered and they failed I had it all figured out”

What is the meaning with this verse. What does Fireworks and lights stands for?

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Negative
Subjective
Sadness
Memory
Longing
Reflection
Relationship
Epiphany