I had some floor lamps and wanted to buy newer LED bulbs to save money. Due to the design of many older lamps, newer LED lamps have a thicker base and will not fit the socket. You lift the base just enough to fit the LED bulbs. This also worked on my lamps where the lampshade mounts were causing a constriction near the bulb. Again, this has raised the level of the new LEDs to a level where they are well suited.