The emissives are turned up extremely high to achieve the glow effect. It interacts weirdly with the game's built in depth of field. If you don't like it enable the lower emissive option or use a different DOF solution.
Update: Optimized install size, added options for a darker cord and/or lower emissive strength on the lights.
Textures and light meshes from the mod 'Christmas Tree' (NSFW) https://www.xivmodarchive.com/modid/69930 Created by Cultist @cultistmods. Cultist's textures are bundled in this with permission (Thanks!) Follow their perms if you want to do anything with this mod because I don't have any requirements on my part.