Who said that led lights can be replaced with light bulbs?

Of course. But there must be materials and technology.

LED lights are not light bulbs, but beads. You need to turn on the light and then change the materials inside. You can't do it without skills. Actually, it's not difficult, but even if you have the technology, where did you get the materials? There is no such lamp bead on the market.

This is the replacement of the whole lamp. If you are talking about something else, such as track spotlights, a track with spotlights, you can also change it and buy a new spotlight.