With every new Genshin Impact update, we get new characters in the game, and to ascend them, we need to farm their ascension materials. One of them is the Lumidouce Bell which is an ascension material required to ascend characters like Lynette, and it will become available in Genshin Impact 4.0 update to farm.
Their in-game description says, "A serene and tranquil violet flower. It has a light, soft, and lasting scent and is often used for making luxurious perfumes." Since Fontaine will be the new region coming with the update, you will be able to find Lumidouce Bell in it; however, it will be a difficult task to explore a massive region to farm them, and thus, here are their exact locations to save you a lot of time.
Genshin Impact: Lumidouce Bell Farming Location
Lumidouce Bell is a local specialty of the Fontaine and can be found in the north and south side of Fontaine. You can find all the locations of Lumidouce Bells marked on the map below.
You will need a total of 168 Lumidouce Bells to ascend Lynette to her highest level, and as per the speculation, you can farm 25 of them in a single run. After that, you will have to wait for them to respawn to grab the next batch.
You can travel fast from one location to another by using Teleport Waypoints and the Statue of Seven to collect them quickly. In addition to this, make sure that your HP is enough to fight enemies, as you might encounter some while exploring.