Surface Mushrooms allows mushrooms to be placed on the surface of the world, in any brightness. You can use them as decoration without having to change blocks or create a roof. They'll be able to survive no problem.
Let the sun shine bright!
You may freely use this mod in any modpack, as long as the download remains hosted within the CurseForge ecosystem.
Serilum.com contains an overview and more information on all mods available.
Comments are disabled as I'm unable to keep track of all the separate pages on each mod.
For issues, ideas, suggestions or anything else there is the Github repo. Thanks!