Our family runs a hotel, and my father says that the lights in every room are too bright, so I want to turn off some light bulbs:

At present, the light bulbs are all connected in parallel, and there is no influence between them. So after you loosen the three bulbs, the last bulb will still light up, and the design of the lamp holder also takes this into account. There is isolation between the positive electrode and the negative electrode, so they will not touch each other. I often do this at home. Just turn off the light bulb and I'll be fine.