New house has those inset spotlights all over the place*. One of them has gone, but it has absolutely no identifying marks other than a small 'M' near the pins. It's quiteheavy and made of glass. What different kinds are there? I guess I should measure the voltage as I think there's a transformer somewhere judgeing by the buzzing when I lower the dimmer. Also, any known cheap sources of these online?
Thanks
John
*which are going to look very dated quite soon if you ask me.