My kitchen has 7 recessed light bulbs in the ceiling. Since early 2000, I have been keeping track of how long the bulbs last. Here’s a graph of the results to date, showing bulb life in days. Click on the graph for a larger image.
You can see that Phillips incandescent bulbs are the least reliable; on average they only last 177 days. Of the incandescent type, GE, Sylvania and Feit are pretty comparable. Sylvania lasted 393 days on average, but since there were only two of them it’s not statistically significant. GE lasted 315 days on average, and Feit 360 days. There’s probably not really enough data to distinguish between these three bulb types.
Somewhere around 2002 I started using more and more compact flourescent bulbs. By now I have filled most of the sockets with this type, and many of them are still working. The flourescent bulbs that failed early show up on the graph, but shouldn’t be taken as representative of flourescent bulb life. Some of them are still in the sockets after 3, 4 and more years.
There’s the data; do with it what you like!
What I would like to do with it is suggest you might want to get a hobby. 😉
Comment by Don — August 29, 2006 @ 4:00 pm
Can you pie chart this and then do a histogram? Then you should show the mean and the std dev. I also think error bars should be shown. What kind of statistics are you trying to pawn off on us?
Comment by Don — August 29, 2006 @ 4:03 pm
Don — You’ve been an engineer too long!
Comment by Daryl — August 29, 2006 @ 4:29 pm
That could be but I’m not the one who tracked and charted his lightbulbs. 😉
Comment by Don — August 29, 2006 @ 7:42 pm
Zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz!
Comment by Heather — August 29, 2006 @ 8:51 pm
Heather, how can you sleep through such exciting and useful information?!?
Comment by Daryl — August 29, 2006 @ 9:35 pm
We have lived in our house for 4 + years and only had to change 1 light bulb in our kitchen. No clue what kind they are, but they must be good when comparing it to your data.
Comment by Heather — August 30, 2006 @ 6:46 am
umm.. I have some nerdy family… And I’m the offspring of one of them. no wonder I married one. omg.
Comment by Jocelyn — August 30, 2006 @ 3:20 pm
You guys just don’t get it! This is just like “Consumer Reports”. I’ve evaluated some different light bulbs so when you are in the store you can make an informed choice!
I’m saving you gobs of money, and all you can do is laugh at me!
Comment by Daryl — August 30, 2006 @ 3:30 pm
I need you! I have written on my Things for Daryl to do: “put in new light bulbs in bedroom and floor lamp”. A few days ago, I had to change one in living room, and now there is just one which works in the bedroom. Apparently, they were cheap bulbs, because they have burned out faster than I can buy them. I have used the last 60 watt, so need to buy some immediately.
Comment by Mom — August 30, 2006 @ 5:32 pm
I suggest you get Westinghouse Fluor.
Comment by Don — August 30, 2006 @ 5:40 pm
Thanks for the Consumer Reports Family edition, but would you mind evaluating something that costs more than $3.00?
Toaster Ovens
Coffee Makers
Telephone (Cordless battery comparison)
What else do you have in the works?
Comment by Heather — August 31, 2006 @ 7:31 am
how bout lamps, like the whole thing.. and storage containers, and shelving. maybe mold removers? that’s what I’m currently in the market for.
Comment by Jocelyn — August 31, 2006 @ 10:38 am