Not to disagree but the expected life of CFs is over rated. I've been using them as primary lighting for almost ten years and I regularly have to change them. The heat they dissipate seems to cook the sealant around the base of the tube until it fails. So they last just about the same as a halogen.
Worse, when you remove a spent bulb, you really must be careful about hanging on to the transormer socket when twisting it off, because the glass will just come off.
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