Changing an entity all the same time?

So I’m trying to change the color of all my lights in my level accept it’s really tedious to do them one by one so i’d like to edit them all at the same is it even possible to do this?

open the vmf with notepad++ and search/replace the values

In the menu bar under “map” there is “entity report”, you can select all the light entities at once from there

[editline]28th July 2017[/editline]

https://developer.valvesoftware.com/wiki/Hammer_Map_Menu#Entity_Report…