I know that this question may be off-topic here, but I'll ask it anyway since they do have electronics inside.
I've noticed that my fluorescent lamps keep dying after only couple of months of use. When they die, they die in groups of 2-3 and as far as I can see, both new and old lamps may die during such events. As far as I can see, electronics inside dead lamps look normal to me, but then again, I don't have much experience in electronics, so I could be wrong.
So I'm asking you people what could be the cause and how can I prevent it? I'm thinking about bad electricity supply, because I have frequent brown-outs, but as far as I can see, deaths of lamps aren't more frequent during times when I have brown-outs. I'm thinking about connecting lamps over a UPS or "power conditioner".
I did some investigating and I think that I've found source for my problem. As I mentioned, I had brownouts. I noticed that nobody in my area had brownouts, so I the problem was probably with my installation. Then I noticed that voltage for two phases was between 220 V and 230 V, as expected, but one was between 190 V and 200 V. The main cause for that seems to be a 35 A DIAZED DIII fuse which is connected to the phase which powers my lamps. It turned out that the tip of the cartridge and fitting element of the fuse case were corroded and were sparking and overheating (the cartridge was so hot that I had difficulties removing it). It also turned out that when power company replaced my electromechanical meter with solid state meter, they installed new circuit breakers in such way that fuses are serially connected to breakers and are "downstream" from them. I talked to few electrical engineers and electricians and they all believe that since circuit breakers are installed, fuses should be removed. I'll get an electrician to remove them will report back how that effected lifetime of my lamps.