recessed can keeps burning out lamp?

[Bluff'er]

In my kitchen there are several recessed can lights. One switch turns on a string of 2 Juno recessed low voltage lights. The controlling switch is a dimmer switch. My problem is that one of the lights keeps burning out. The lights are not used often. The same fixture has had the lamp replaced 3 times in the last 2.5 months.

Is the problem the switch or the can?

If it's the can what is the best way to fix the problem? The fixture is not a "pop in" type of fixture.

Thanks

[AllanJ]

At least try this. Don't turn the dimmer all the way up. Incandescent lamps rated for a given life at a given voltage last much longer given, say, 10% reduction in voltage.

Other factors could be vibration from persons moving about on the floor above, or excessive temperature from insulation being packed in too close to a non-IC rated fixture.

[Bluff'er]

Thanks for the suggestions AllanJ. I describe more detail based upon your comments.
I only use these lights as night lights. So they are actually only on as low as the dimmer allows.
The lights are installed in a cathedral ceiling so there is no floor above to cause excess vibration.

I can't tell if the fixture is IC related. Is there a way to see just by looking at the inside can. That's all that is exposed. Would that cause the bulb to burn out?

Thanks again!

[Bluff'er]

Thanks Mainlymojo,
I am pretty much an electrical novice. So I didn't quite follow all that you said.
Here are my assumptions based upon your statements:

I don't think these fixtures are on a single transformer. I beleive each fixture has its own individual transformer. I am not experiencing a domino effect. Only one light fixture is burning out lamps while the other remains unaffected.
The dimmer works and controls the light level as one would expect. I am not sure if anything behind the scenes is going on.
There may be heat buildup, but the fixtures are always on the lowest setting because they are only used as night lights. There is never any flickering.
I use the halogen MR11/MR16 lamps....the GU10 base is not compatible with my fixture.

Thanks

[househelper]

Halogen bulbs are designed to burn hot (full voltage) so that the tungsten reacts with the halogen gas and redeposits, resulting in longer life. By running these at a constant low power, you are actually shortening the life of the bulbs. Try running at full power for awhile to see if the bulb life improves.