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http://www.basecuritysystems.no-ip.com

Thanks for the quick reply.

Sorry if I wasn't clear, its the dimmer that supports the GU10 bulbs. The
light has 12V bulbs I think.

Andy

Then you really need a dimmer which will be compatable with the transformer that
runs the light fitting. The most commonly used transformers now are electronic
types but there are still some which use either toroidial or parallel wire coil
windings, so you need to check which style transformer your light fitting works
from then choose a dimmer switch to suit it.

Sorry I can't be of any more help on the specific types because I don't know
which light fitting you have.