As the title says… I have my directional mode in the lighting tab set to directional mode. But whenever I build the scene, the output is non-directional. Anyone with a suggestion/solution to this?
What platform are you building to?
Building for Windows 
I’m guessing you’re referring to realtime lightmaps. The logic that decided which shader variants should be stripped was faulty for realtime lightmaps. The fix will appear in 5.2 shortly.
Please check this bug description for the current workaround: Unity Issue Tracker - Directional Specular realtime lightmaps don't work in the player
Thanks a bunch! This fixed the problem 