Abstract of DisclosureA lighting apparatus which enables a shade to be easily attached, detached and rotated with a simple structure and an enhanced degree of freedom in design. The apparatus includes a power unit, a light emitting element array, a constant-current circuit unit, and a voltage limiting circuit unit. The support is rotatably provided on the back surface and engaged with the leg for defining an angle of the leg with respect to the back surface. An image transducer is connected to the second end of the cable and is connected to the wires. Details of the alarm storm can be retrieved on an as-needed basis. A non-contact section 26a is formed all the way around the inside end section in the axial direction of the cylinder section 20 such that the outer diameter is smaller than the inner diameter of the inside end section in the axial direction of the outer ring, and the dimension L26 in the axial direction is two times or more the thickness dimension t19 of a plate member of the cover 19a.