Modify 2D Point Light Distance in runtime?

My game has a camera stack with mixed 3D and 2D rendering. I'm moving the 2D light's x position to match the position of the 3D skybox light. I'd like to do the same with the z position of the 2D light using the point light's Distance variable, but it's read only and I can't manipulate it in runtime via script.

 //get 3D skybox sun angle
 float sunRotation = cameraRotation.localEulerAngles.y;
 sunRotation = (sunRotation > 180) ? sunRotation - 360 : sunRotation;
 
 //move 2D light's x pos in relation
 transform.position = new Vector3(sunRotation / 18f, transform.position.y, transform.position.z);
 
 light2D.pointLightDistance = TODO;

Any idea why it would be read only and if there's a work around to changing that? You might say just move the 2D light with it's z transform, but it doesn't work like that because it's a 2D light.

Thanks!