Following on another thread regarding the +x% bulbs, I've put up this thread to find out how long your light bulbs last you?

Post up how many miles you do in a year and how much you use your lights with any comments

Ages - certainly measured in years, although the higher performance ones do tend to die sooner - they generally have thinner filaments to get the extra light.

Have had one go on each car in the last 5 years or so.

Poll added

About 9_000 miles, 300 hours a year, lights on for 4 or 5 thousand, maybe 150hr of that!

Answers refer to 2 different cars, and the +50% bulbs went in just over 2 years ago, so I don't know how long they will actually last

Standard H4 on dipped beam. I run my lights probably for 60% of the 30,000 miles a year I do (quite often have them on in daylight). I chose the 2 year option because these are the same bulbs that my parents had and the car's been with the family for 2.5 years now (approx)

10,000 ish a year and I've not changed a bulb since the car was made in 2003. (Bet they all blow this week now!)

40,000 miles a year, and I use my dipped beam in any bad light conditions (rain ect) and on the fiat I have only changed one tail light so far, and the car is two years old in April....

both headlights still fine....

It's enough hassle changing the bulbs on our two Furbys without sticking ones with short lifespans in - twice as bright, half as long...

SWMBO's car came back from its MoT with a bulb out this time around!

Hmmm. It's a small sample, but it suggests that 50% brighters are at least as reliable as standard bulbs. That doesn't really surprise me, because the higher light temperature and extra brightness are done partly if not wholely by using Xenon rather than Iodine vapour, which allows a higher filament temperature without increasing the erosion rate.

My Philips Xtreme have lasted a year so far and 12,000 miles.

I get the impression that the 50% are shorter than the other ones by a pretty small amount, but that the 80/90% ones appear to be suffering in the life time stakes.

Will have to see what is shown out as we get more answers.

I don't see the value of "I have plasma discharge units" as an option. And would read "don't know" as standard H4 or H7 depending on model.