I replaced all our old halogen ceiling lights in our caravan with new 12v LED ceiling lights. Also replaced two old halogen spot lights and this is how I done it.

Here are the links to the LED ceiling lights:

https://www.amazon.co.uk/dp/B07CKTK3Y...

https://www.amazon.co.uk/dp/B08F7SMMY...

LED spot lights:

https://www.amazon.co.uk/dp/B01A50VX4...

Our caravan handheld vacuum cleaner:

https://www.amazon.co.uk/gp/product/B...