Evolving Eevee in the smartphone game has become a scientific discipline in its own right — especially if it is to be done in a targeted manner.
It's alright, but it's not the best shiny Eeveelution by any metric.
Wait until the lighting in the game clearly shows whichever time you need to achieve the desired result.
However, if you want an Espeon faster, you can use the nickname Sakura.
All eight evolutions are now available on Pokémon GO.
While its max CP is lower than Flareon's, Leafeon isn't necessarily that much worse.