Lights won't rotate

I’m currently trying to set up a scene in blender and none of the lights will rotate. I’ve tried to use “r” to rotate the lights into position but they will not move in the scene, the lights will translate however. I also checked to see whether the rotations were locked in the N menu, but they were not. I’m currently using the latest mac version of blender. Is there any way to fix the light rotations?