Legally speaking it is - anything that changes the appearance of something is criminal damage, no matter how quickly or easily it can be restored to its original state. That's how the law is worded, so it covers anything that can be removed or any damage that can be repaired.
Moving the lights would (imo, nal) count under this though it sounds ridiculous, because the camera has been changed, and needs someone to come and move it back. So although no "damage" has been done, it has been changed and needs to be restored.
Any sentencing should take into account the reality of damage done and how difficult/expensive it was to repair/restore.