140412-1244 EDT
If there is no air flow around the bulb, then this may be the problem. What kind of fixture?
See my posts #10 and #11 at
http://forums.mikeholt.com/showthread.php?t=160447 .
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The style of fixtures vary.
In the gimbal style track lights, Utilitech BR style bulbs have failed quickly..
the standard par30 50watts shortneck are getting scarce.
My customers are SLUTS , they will "screw anything" in a can.
Sylvania , FIET , EIKO, and others have had good service life.
People will goto big blue or big orange, and are overwhelmed by the selection, and cannot find the correct bulb.
It just seems as though their quality has plummited recently.
Spiral bulbs tend to last fairly well in can lights, as compared to incandent BR and PAR bulbs.
Is it better to put a BR40 in a can and fill the trim,so that the heat is projected out,
or, put a smaller BR30 in a can with space between the bulb and trims to allow the the heat to flow up and through??