This is the 5742nd most frequent Catalan word.
florian
"Florian" is not a Catalan word; it is a proper noun, often used as a name.
In this sentence, 'florian' is used as the verb 'bloom' applied metaphorically to city lights.
Els llums de la ciutat mai no florian tan bonic com a la primavera.
The city lights never bloom as beautifully as in spring.
Here, 'florian' refers directly to flowers physically blooming.
Les flors del jardà florian cada any de manera espectacular.
The flowers in the garden bloom spectacularly every year.
In this usage, 'florian' is metaphorically describing how emotions manifest strongly.