To the Lighthouse is said to be the best novel of Woolf because she manages to knit characters’ thoughts through the use of formal experimentation: run-on sentences, meandering paragraphs and stream-of-conciousness. So, the plot is not important, but characters’ inner self. Woof goes for the emotional impact of their internal landscapes.
This work is published in 1927 in the interim of her two other notorious novels; Mrs Dalloway and Orlando.
We can see emotions, beautiful moments, the relationship between art and life, the struggle with the patriarch power…
This novel is so rich in symbols and allegories than I recommend you to study the following document in order to analize this novel (to a certain extent, of course)