Unfortunately, the actual lifetime of the light bulbs and lampshades in malokontroliruemyh their exploitation is often not as long lasting as I would like. Smash bullies, hurting those who prey on the public (and, say, no man's property. And the lack of control and lack of adequate protection measures to contribute.
Propose technical solution to improve the situation. Its essence - in fixation plafond lamp obscure way. And from someone who wants to ensure that the luminaire and the lamp longer serve on the landing or for example, in the hallway of an apartment building, significant time, material and physical cost is not required.
However, first have in the holder (opposite one the threaded cavities) to perform hole M3. In it, after a preliminary and rough screwing the lampshade, screw countersunk screw-locking mechanism. But at first, not until the end, and to leave on the glass ceiling at risk for subsequent spalling or chipping recess under the edge of the screw. Then the ceiling again to screw into the holder. Finally screw and countersunk the screw-locking device.
Concealed fixing for the ceiling lamp protection from unauthorized access: 1 - interior light; 2 - holder with light bulb; 3 - countersunk screw-clamp M3; 4 - holder; 5 - wall
Now neither the ceiling nor the lamp quickly and quietly (as it could be done once done remove. You will need hand tools and stand or stairs. Besides solving the puzzle albeit a small secret (protection light device countersunk screw-clamp) to the uninitiated will have to spend some time...
And if the residents on the alert, on a stranger, swarming the lamp, be sure to pay attention and take appropriate action.
Author: V. Zelenov