The following blog on our site explains how this is done (dutch only).

https://www.lightexpert.nl/blogs/informatie/tl-lamp-vervangen-door-led-tl-lamp/

Be aware that there are fixtures in circulation that have a starter as well as a ballast.

For these fixtures, we advise removing the starter as well as the ballast in order to connect LED light tubes.

LED Light tubes are always directly connected on 220-230V.