To extend the life of bulbs, plug in the power circuit semiconductor the diode will lower the voltage on the lamp. But where to post it! If it causes you difficulties, install the diode in the basement from the blown bulbs.
The diode type D, D, D, D cut conclusion with threaded and solder this side Central pad lamp base. Then in the center additional cap drill a hole opposite the output diode. And it does not touch the walls, lay inside of the cap layer of paper or insulating tape.
Connect by soldering the first output diode to the additional cap, and then both of the cap.
Author: E. Dolgorukov