I've had trouble with them in two places -- a light fixture in the kitchen I keep threatening to replace that also eats standard filament bulbs and the ceiling fixtures in the basement that hold the bulb upside down.

Some bulbs seem to fail faster in those two places. Otherwise, with decent cooling, they seem to last much, much longer.

Can't tell you about the energy savings, I don't pay the bills. Probalby save more if I could persuade my mother to switch the basement lights off once in a while.....

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!