These LED spots work on 230v and can therefore be used without a transformer. The LED spot has a GU10 base / socket.
An LED spotlight is up to 10x more economical than its predecessor. An LED spotlight is also a lot safer. Because the temperature is a lot lower than a halogen. A LED spot comes about 60 ° C, but a halogen comes quickly 250 ° C

Can a GU10 LED spotlight replace a GU10 halogen spotlight?

The technology is already so far advanced that an LED spotlight can perfectly replace a halogen, both in a warm light and dimming.