What is the minimum power level for requiring electrical regulations?
One example would be sensor driven LED night lights, mainly for hallways/stairs and outside decking but also considering having some mood lighting in specific places. These would be very low power LEDs that would be running power via cables directly to a low voltage controller.
They wouldn't be replacing the house lights, but would be used at night just to get me from room to room without switching lights on or watching TV without having ceiling lights on.
Even if it's not an issue, how about getting scrutiny from building inspection?
They may see it as unapproved electrical work (lights not in plans) and get grief over it.