Phosphor is a great mod. Quite useful for Chunks. But for me, Starlight is more handy. But since Phosphor and Starlight do the same job, they are incompatible and I cannot use Starlight because I cannot turn off Phosphor. Sad...

With the 2.7 update, Lithium can be turned on and off. Maybe the same could work for Phosphor?

And I have to say you did an amazing job! Each update mod offers even better performance and stabilization! Thanks :)

Starlight rewrited light enigne,Phosphor modified light enigne,that means they are totally incompetible,If we need to use Starlight the only way is turn off Phosphor.

Would be helpful if you could give me logs showing what parts of Phosphor conflict with Starlight when you try to run both together

ahdg6 is true. Starlight already has a conflict with Fabric versions of Phosphor. It's impossible the use both of them.