Why do bulbs burn out in half of the house?

Private house. Through the corridor is divided into 2 halves. Changed the wiring to copper. Lighting and electrical appliances are connected separately. Counter for 2 halves one (total). The wiring is from the corridor. In one half of the house, bulbs constantly burn out and completely cuts off the light. In the second half, there is no such effect. Electrician explains this with bad incandescent bulbs. But these same bulbs work great when plugged into a desk lamp through a wall outlet. Please give some advice!

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