While using the wired DMX output on WLED limits you to a single universe (512 DMX channels or 170 RGB pixels) it does let you make use of any DMX fixtures you may have.  These are often much better for lighting large areas. It also lets gives you a very economical way to make a stand alone DMX controller while a huge number of built in effects. Saves you having to pull out a lighting console to make use of your DMX lights. While WLED does have incredible support at https://kno.wled.ge/ , I did find it difficult to get much information on using the DMX output. So I created a page with some DMX information that will hopefully help:   WLED DMX