These are 12V, which is what I would expect in the UK with that GU5,3 connector. Exactly as Larry says, you would want to factor in changing the lampholders over to GU10.

What I would sell here is the Lampholder at 1.25, and a Megaman Modo 4.5W GU10 (42W Equivalent, non-dimmable, available in 3000K and 4000K) at 8.00, that's all inc Tax. This is all in 230V though, but I would imagine you would be able to find something similar in 110V in Mexico, at the same price you're looking at roughly 190 Pesos.