Generally low build quality, Chinese (the company sent me the product in Chinese packaging so you understand), 1 out of the 2 I ordered arrived with a cut cable (I fixed it myself), but the worst of all is that the cables are so thin (and not even copper) that they are not suitable for more than 2 watts load at most, beyond that they will overheat excessively within 10 minutes and after 5 watts the plastic insulation will likely start to melt very quickly, they will make contact with each other (because they are simply loose inside the construction) and boom, you'll get a short circuit and the fuse will blow.

If it didn't have this issue with the cables, you could maybe use 5 of these but with ~5 watts as the maximum safe load per lamp, but that's about it.

It solves the problem in some situations, mainly old design lamps that required special long-necked bulbs.

5 LED bulbs and you have the light you want, in total the bulbs should not exceed about 50 watts. 21/09/2024 I use it with 5x7 watt bulbs, it raises the temperature resulting in them burning out faster

It supports up to 60 Watts, practically meaning that you can use almost any bulb you want with LED, as these specific bulbs have lower power consumption than older types of incandescent bulbs. Made of plastic, it appears durable and resistant, the only downside for me is that the power cables from the top side (not from the bottom, the one shown in the photo) are exposed and not in internal channels. This may potentially affect the durability of the cables in the long run, due to temperatures. In my case, the adapter fit into a lamp with a shade without any difficulty or touching. Installation and application are extremely easy, its operation is flawless. Personally, I wouldn't say it's not aesthetically pleasing, but it's a matter of taste. I will come back with measurements for its size (diameter, etc.).